Add CustomizeWarningErrorHighlights fixin to the workspace.
Make the workspace schemes shared.
Simple and effective target that builds ALL fixins.
Added script phase to add xcode5 "compatibility" to all targets.

Also squelched some "validate" warnings in xcode.
Merge branch 'build-all' into development
Merge branch 'xcode5-compatibility' into development
Xcode5 compatibiliy / Info.plist postprocessor build script. Workspace tidy.

Simplified workspace a bit, working build script to enable/disable
troublesome build targets and postprocess Info.plists to add
DVTPlugInCompatibilityUUIDs, etc via `defaults write`.
Merge branch 'xcode5-compatibility' into development
Refactored Hide Distractions.

Fixes #20.  Seems faster, too.  Tested and workng on xcode4 and 5.
Fix up build architecture settings.

(As best I can tell: plugins need to build for both 32- and 64-bit
architectures, except for CustomizeWarningErrorHighlights, which
fails to link in 32-bit mode.)
read xcode DVTPlugInCompatibilityUUID in build all xcode5 compatibility script
Add note about building for Xcode 5.

As suggested in discussion of Issue #25.
Promote UserScripts to non-experimental (at least, as these things go).
Make FindFix work, kinda sorta, in Xcode 5.

Issues (purely cosmetic as far as I can tell):

- Pressing Cmd+F with find already open puts replace widget at the
  bottom of the view (presumably the calling code uses addSubview);
- Find bar layout is a proper mess;
- Show Find Options… menu option is enabled, but does nothing.
Improve Xcode 5 find bar appearance when FindFix is active.
Fix incorrect position of replace text widget when finder mode changes.
Fix dodgy comparison - though I’m not sure it’s THAT much better now.
Remove find options menu item.
Remove some unused code.
Reinstate Xcode 4.6 compatibility.