add changeMode event
do not modify string split on chrome
sometimes editor is blank on ie10
change toggleCommentLines behavior to match sublime text
use general toggleCommentLines for all modes
range.clone in getFoldsInRange is slow
fix alt-shift click
do not call splice from resetRowCache unnecessarily
remove remaining uses of deferredCall
fix failing tests
Merge pull request #1260 from ajaxorg/toggleComment

Improve toggleCommentLines and make it faster