Bump version number post-4.1
[livescript mode] Fix empty tokens, clean up style

Remove .ls source file
Register select-all detection timeout per editor

So that a subsequent context menu handler can cancel it

Issue #2491
More proper prevention of select-all race condition

Issue #2491
Fix logic error in onFocus

Issue #2494
Remove debugging code
Prevent select-all hack from confusing readInput when there is a selection

Issue #2496
Another fix around the select-all hack

Issue #2495
Scroll change, rather than cursor, into view on undo/redo
Fall back to nullRect in measureCharInner to work around Safari issue

Issue #2492
[jade mode] Re-write to match the jade lexer
[jade mode] Fix linter errors

Issue #2490
Make sure gutter is redrawn when a document is shifted

Issue #2498
[compression helper] Use CodeMirror for code field

Dog food, and all that.
[runmode addon] Pass state to blankLine

Issue #2502
[foldcode addon] preventDefault clicks on widgets

So that the click doesn't kill editor focus.

Closes #2505
[haxe mode] Line comments for Hxml
[vim]: IE8 fixes.
 - avoid array .indexOf - fixes % key and non-pcre searches.
 - avoid array .map - fixes a couple of non-running tests.
[shell mode] Fix empty token bug

Issue #2506
[vim] Fix bracket matching off-by-one