Remove the old build scripts.

Most people are likely using workspaces, so these scripts don't get much testing. If needed they can be resurrected.
Update build instructions to not reference the removed scripts.
Updated with changes from OmniGroup svn [r209919:r217626]

General:
- Lots of deprecation fixes for APIs that were soft deprecated in the past, but no one noticed... Still plenty of deprecation warnings to fix on the Mac side.
- Started taking advantage of iOS frameworks, but since Xcode has no migration path, this is slow going.
- Converted unit tests to XCTest
- Removed references to NSZone
- Removed -[NSObject(OFExtensions) bundle]; use bundleForClass: or bundleWithIdentifier: at call sites
- Various localized string file updates

Configurations:
- Added configurations for iOS bundles (for app extensions) and frameworks.
- Require iOS 8.0 and Mac OS X 10.10
- Enable a few more warnings across the whole code base
- Temporarily make deprecation, unreachable code, and undeclared selector warnings not errors so we can address them w/o blocking builds

Scripts:
- Added --skip-fix-strings-files argument to CopyLibraryResources
- Updated Scripts/rubylib/xcodeproj.rb to be a little more class-y, a little less Hash-y. Updated calling scripts

OmniBase:
- Added experimental code to OBExpectedDeallocation find references to the leaked instances. This helps paper over the mess created by ARC inserting tons of extra retains/releases and Instruments Leaks event matching being so poorly done.
- Whitelist some more bad system API in OBRuntimeCheck.
- Remove GC-only helper functions
- Add some ARC helpers that wrap ObjC API that is disallowed when -fobjc-arc is enabled
- Add some more objc_msgSend wrapper functions (OBCallObjectReturnIMPWithObject, etc.)

OmniFoundation:
- Updated to be ARC friendly, but the extra ref counts added by ARC make low level code more of a performance issue, so this framework isn't converted to ARC.
- Replaced OFLockRegion_Begin/OFLockRegion_End with OFWithLock(), taking a block.
- OFNetStateRegistration now keeps track of whether it is invalidate and doesn't assert that the timer firing it its timer (which will have been nilled out).
- Added OFNetStateMock.[hm] which has one-process replacements for OFNetStateRegistration and OFNetStateNotifier. Currently these are used unconditionally in the OmniFileExchange tests, but they should be made conditional (well, you can comment out the registration line to "configure" it).
- Fix an assertion failure when quickly invalidating OFNetState* classes and setting up new lines (like in the tests). We can get told that services are disappearing that we never heard about their appearance.
- Rename the 'state' property on OFNetStateRegistration to 'localState' to avoid getting confused with the methods on NSCell, NSButton, and NSMenuItem.
- Added unit tests for OFMutableKnownKeyDictionary
- Added unit tests for OFTrie, fixed a long standing bug they exposed
- Added OFPerformanceMeasurement
- Add an iOS framework target
- Removed -afterDelay:performBlock:, replacing it with OFAfterDelayPerformBlock().
- Enabled bundle support in OFBundleRegistry on iOS now that there are frameworks
- Added support for 'registration' files that are more easily shared between Mac/iOS and can do all the OFRegistrations stuff instead of just user defaults.
- Added OFPerformInBackground() which makes a one-shot operation queue
- Added -[NSIndexSet complementOverRange:] convenience method for finding the relative complement of an index set with respect to a given range.
- Fix a problem where NSNetService entries would sometimes pass a TXT record data of <00> to OFNetStateNotifier after passing their real data. Possibly a new bug with 10.10, but we've not isolated it yet

OmniSoftwareUpdate:
- Fix some -Wshadow warnings
- Updated iOS strings on preferences view to fit smaller spaces

OmniAppKit:
- Updated Help support to allow apps to specify the size of the help window
- Added -[OAController openURL:] funnel point for subclassers to intercept
- Add a framework target for iOS
- Added NSWindow -convertPointToScreen: and -convertPointFromScreen: convenience methods
- Use NSTitlebarAccessoryViewController for the construction-tape view used in our betas instead of injecting it directly into private parts of the view hierarchy
- Fixed some issues with font lookup in OAFontDescriptor
- Added helper code to OADocument to disallow saves to the app wrapper

OmniInspector:
- Updates for ARC friendliness changes in OmniFoundation
- More fixes for floating vs. docked inspectors
- Updates for Yosemite look and feel

OmniDAV:
- Add better support for injecting extra strings into the user agent header
- Fix crash due to race condition in setting up the token delimiter set
- Updated `odav` command to termindate when async commands are done

OmniDocumentStore:
- Add a new ODSFilter initializer that searches all the fileItems of a scope, and rename the top-level-only initializer to be more explicit
- Updated approach to instantiating documents from templates

OmniFileExchange:
- Fixed a rare-ish race condition in conflict handling where two clients could attempt to rename the same files to different file names, ... resulting in conflicts, repeat. Now, conflict renames are local-only. All clients observing the conflict will rename the user-visible files to indicate the conflict, but the user-intended document name won't be changed on the server until the user manually renames one of the conflicting files.
- We no longer have a notion of 'shadowed' file while there are name-based conflicts.
- Name based conflicts no longer rename the server version of the file, and in fact any number of files on the server can stake a claim to the same relative path
- Instead, we have a new client file state, 'automove': when there is a name conflict, all the conflicting files are assigned new conflict names. Edits can happen to those files and the desired names will not be updated on the server. This avoids the buggy case where one or more observing clients notices the conflict and attempts to resolve it by renaming the files, possibly leading to further conflicts.
- When a file is renamed by the user, if that name is the original name, the other files have their conflict names finalized as their real names
- If a file is left as the only automove'd file (the other versions are deleted or renamed away), then it is given back its desired name
- We now post the last edited user name and host name in the server's Info.plist. If this is present, we use it when generating the conflict file name for that file.
- Added more tests, including one that provokes the bad case.
- We no longer attempt to intuit moves by NSFilePresenter notifications, but rather do inode-based match ups.
- Metadata updates are now deferred and coalesced.
- We keep track of moves we've noticed while scanning and apply them in bulk so that name swaps are detected by our inode matching
- In the case of too many errors, we now automatically pause syncing, rather than flooding the server
- Improved unit tests
- OFXServerAccount instances can no only be either for document syncing or import/export, not both (can make two account instances if both facilities are desired)

OmniUI:
- Added support for more types of properties on OUIAppearance
- Added support for user-overrides of appearance values via property lists placed in the right spot (with NSFilePresenter support for dynamically updating them)
- Cache values computed via dynamic accessors
- Add support for aliases
- Add better support for subclasses and splitting up appearance plists
- Changed OUITextView delegate method -textViewShouldPreserveStylesWhenPasting: to -textViewShouldPreserveStylesWhenPasting:defaultValue:sender:.
- Add OUIUndoBarButtonItemDelegate protocol with -viewControllerToPresentMenuForUndoBarButtonItem:
- Add a OUIUndoManagerDidRemoveAllActionsNotification notification and make OUIUndoBarButtonItem observe it to update its state
- Remove OUIUndoButtonController and use OUIMenuController for the popover
- Added OUITransition and OUIVerticalSplitTransition.
- Switched to new Photos API
- Added OUINoteInspectorPane
- Cleaned up special/debug URL handling
- UIAlertController in a bunch of places where UIAlertView was before
- Updated design for IAP
- Lots of accessibility improvements
- Lots of adaptability updates and rearrangement of the document picker views
- ... lots of other updates for iOS 8
Updated Xcode/iOS/Mac OS version requirements.
Missed a comma.
Don't leak the lazily created mutable dictionary.
Fixes #87