Added -[RACSignal ceil]
Add examples of where -floor vs. -ceil is useful
Refactor +min: and +max: unit tests

These operators should return the min/max of the _latest combined
value_, not the min/max of all time.
Refactor +min: and +max: to pass tests
Merge pull request #40 from github/fix-min-max

Fix +min: and +max: to not use running numbers
Merge pull request #39 from github/ceil

-ceil
++RAC for multicast changes
Explain how to delay -animate
More emphasis on the "before"
++RAC to easier-signal-naming branch
Replace manual name updating with -setNameWithFormat:
Added RACSignal constructors for zero values
Added -negate
Set a signal name for -negate
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