Added keyboard support (fixes issue #30)
Removed li=active attribute setting because that conflicts with keyboard support
Cleaned up whitespace
Added fix for #29/#24
Merge branch 'master' of https://github.com/davidstutz/bootstrap-multiselect
Added selectedClass option to control class used for selected <li>
Removed width:100% style from <label> to keep outline inside menu
Reapplied keyboard support
Merge pull request #31 from programcsharp/master

Added keyboard support.