ZoneGrouping, xcode6GM changes ...
Fix wrong forward property
Use CAAnimation delegate to avoid CATransaction completionBlock loops.
Merge branch 'master' of https://github.com/iamscottchou/MarqueeLabel into iamscottchou-master
Tweak PR #72 fix.
Convert one demo label to an IB-set string.
Update podspec to 2.0.6
Merge remote-tracking branch 'cbpowell/MarqueeLabel/master'