Enhance FileSystem class to also able to execute console command.
Remove wrap mode default value.
Add attribute animation doc.[ci skip]
Revert "Remove wrap mode default value."

This reverts commit 3f832eb5d0c776a9627809a06ba97d7d1f222c8b.
Travis CI: API documentation update at 2014-04-11 05:58:52 UTC.
[ci package]
For Travis CI - switch CI build to use OS X build environment.