Text node highlights fully fade in before fading out
Merge pull request #111 from kylehickinson/master

Text node highlights fully fade in before fading out
ASMultiplexImageNode.

Initial open-source release of ASMultiplexImageNode.  Documentation and
example code forthcoming.

Note:  ASMultiplexImageNode requires Xcode 6 to compile.  Tests are now
compiled against the iOS 8 SDK and run on iOS 7, 7.1, and 8.