some work on sticky add-on
Added flex add-on
Added height viewport to utility component
added IE10 support for flex add-on
Added datepicker animation
Made badge hover color more restrictive
start on refactoring tabs js
Merge branch 'master' of github.com:uikit/uikit
Fixes #495
Fixes #481
changelog updated
made jshint safe
codemirror updated
fixed Cursor position on fullscreen toggle
fixed target option in tab js component
Added a beforeall event with files and a filelimit.

Filelimit is there so you can set the amount of uploads at a time, for example if you want to limit it to just 1.
The before all event is there so you can do something with the uploaded files before the start of uploading.
added more detailed js documentation
added Safari support for flex add-on
cleanup
sticky target param added