Travis CI: site documentation update at 2014-04-10 06:28:33 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/0b9ff78dccce406900f3c8829283db36c59f5a8b

Message: Change cycle mode to wrap mode in AttributeAnimation, add ONCE mode make can play animation then auto remove it. remove PINGPONG mode (now PINGPONG mode is just for sprite animation).