Updates Codemirror version to get rid of the freeze-on-triple-click bug.
Drag the output gutter to resize the editor and output windows.
Adds logic to better handle left/right/backspace/delete with selections.
Indent with four spaces working now.
Respects tabstops when calculating cursor position.
Fixes editor resize behavior on window resize, adds left border to output gutter to make dragging easier.
Handles left/right/backspace multiple selections.
Fixes issue #174. Instead of failing hard on empty repeats, bail early.
Merge branch 'editor-drag-sizing' into nflx
Merge branch 'fix174' into nflx

Conflicts:
	browser/scripts/patterns.js
	lib/patterns.js
	src/patterns.js