Localization improvements

- Added a new 'orientation' setting which can be set to "rtl" to right-align the timepicker list against the input
- Added 'am', 'pm', 'AM', 'PM' lang values
Merge branch 'master' of https://github.com/brandonkelly/jquery-timepicker into brandonkelly-master

Conflicts:
	jquery.timepicker.min.js