Merge pull request #207 from WellingGuzman/welling

Off screen nav updates
Fix Revolving Door Caption on Chrome 24

* Move perspective from parent element to child elements
* Change rotation direction for straight-forward approach
* Modify transition to use $effeckt-caption-transition-duration variable
Merge pull request #210 from thcipriani/bug/revolving-door-half-not-triggered-in-chrome

Fix Revolving Door Caption on Chrome 24 Ubuntu 12.04 and Chrome 29 OSX 10.8.4