[Author: dmaclach]
[Author: dmaclach]

Adds a simple key value animation class. CAAnimation doesn't really allow
you to animate things that aren't part of CALayers, and this gets us 90%
of the way there to being able to not have to subclass NSAnimation for every
animation we want to do.

R=mikemorton
DELTA=155  (155 added, 0 deleted, 0 changed)

git-svn-id: de279663232b6350d3cffc59c8efba27ad613299@447 7dc7ac4e-7543-0410-b95c-c1676fc8e2a3

Yelp/google-toolbox-for-mac,Yelp/google-toolbox-for-mac,chakrit/gtm,sbentzen/Google-Toolbox-for-Mac,innerfence/google-toolbox-for-mac,chakrit/gtm,yood/google-toolbox-for-mac,senpo/google-toolbox-for-mac,Chilledheart/google-toolbox-for-mac,adinardi/google-toolbox-for-mac,innerfence/google-toolbox-for-mac,sbentzen/Google-Toolbox-for-Mac,chakrit/gtm,sbentzen/Google-Toolbox-for-Mac,Chilledheart/google-toolbox-for-mac,senpo/google-toolbox-for-mac,lxcid/google-toolbox-for-mac,innerfence/google-toolbox-for-mac,Chilledheart/google-toolbox-for-mac,senpo/google-toolbox-for-mac,Yelp/google-toolbox-for-mac,pepperpop/google-toolbox-for-mac,lxcid/google-toolbox-for-mac,adinardi/google-toolbox-for-mac,aseehra/google-toolbox-for-mac,adinardi/google-toolbox-for-mac,pepperpop/google-toolbox-for-mac,yood/google-toolbox-for-mac,aseehra/google-toolbox-for-mac,lxcid/google-toolbox-for-mac,pepperpop/google-toolbox-for-mac