Add config file for rbenv
Rotate chevron on click

- add transition css
- add rotate transform
- add rotate and rotated class
- toggle rotated class instead of icon-chevron-right and icon-chevron-down
Allow for VIM block edit of vendor prefix style declarations

- move vendor prefix styles into separate stylesheet without indentation restrictions
Unify same namespace
Merge pull request from Alan - transition
Transition pull request from alan