fix 2 analyzer warnings

fixes #753
Merge pull request #757 from diederich/fix-TTLayout-Analyzer-Warnings

Fix TTLayoutManager analyzer warnings
fix size of activity indicator for TTActivityLabelStyle{BlackBezel,BlackBox]

this came up in iOS 5. Probably setting the size of the activityIndicator to 24x24 fixed this before
fixes #715
allow running the UnitTests scheme

setting Run to yes allows us to run the unit-test
from the commandline with xcodebuild
fix linking failure in ObjC++ projects

declare TTIsInDebugger explictly as a C function, so
projects using (Obj)C++ and including Three20 don't
bail
fixes #779
Fix crash when initializing a popover from TTBaseNavigator

The UIPopoverController designated initializer is -initWithContentViewController:.
Sending -init throws an exception (tested on iOS 4.3 and 5.1).
Merge pull request #784 from miLibris/fix-popover-crash-in-navigator

Fix popover crash in navigator
Updated README.mdown to be used with Xcode 4.x
edit formatting
fixed step 8 to add archive reference
Removed Xcode 3.x references
Conditionally disable access to private UITouch ivars explicitly

UITouch ivars have been removed of the iOS 6 SDK headers: private API access in UIViewAdditions breaks the build on iOS 6.

The flag to activate the UITouch extensions is now more strict, so that it is not enabled by default in debug builds, and require an explicit setting.
Merge pull request #809 from miLibris/fix-uiviewaddition-private-ivars

Conditionally disable access to private UITouch ivars (fix broken build with iOS 6 SDK)
fixed spelling error
Merge branch 'pr/811' into development
added cache:// protocol
comment fix
Merge pull request #716 from clarketus/development

In addition to documents:// add an internal cache:// URL which allows easy fetching of data from ~/Library/Caches
fix a memory leak

closes #813
Fix all remaining compiler warnings