Explain how to delay -animate
More emphasis on the "before"
Move animated signal methods to their own category
Added -doAnimationCompleted:
Use NSAnimationContext's block-based methods
Some tests for the animated signal additions
Link QuartzCore into the DeviceRotation demo
Merge remote-tracking branch 'origin/delayed-animation-documentation' into do-animation-completed

Conflicts:
	ReactiveCocoaLayout/RACSignal+RCLGeometryAdditions.h
++RAC for -replayLast
Demo -doAnimationCompleted:
Merge branch 'easier-signal-naming' into do-animation-completed
++RAC for -delay: fixes
Remove delay from DeviceRotation demo
Merge branch 'master' into do-animation-completed

Conflicts:
	ReactiveCocoaLayout/RACSignal+RCLGeometryAdditions.h
	ReactiveCocoaLayout/RACSignal+RCLGeometryAdditions.m
Merge pull request #45 from github/do-animation-completed

-doAnimationCompleted: