Courtesy of Mike Griffin

Use this in the VIM mode to make the cursor wide in escape mode.

This makes it easier for alternative keymaps to hook into it.

Standardize theme, add links to front page and compression helper.

Closes #409

Add Match Highlighter add-on to lib/utils, a new demo showing it off, and modify index.html to link to the demo

When exiting fullscreen: fallback on width and height set by css instead of recalculating, which was wrong anyway, when pressing F11 a couple of times the editor would decrease in width.

Removing dependency on jQuery, only allow `Esc` to *exit* full screen (rather than *toggle*), and changing class name to be consistent with CodeMirror class naming practices.

Issue #297

Courtesy of Daniel Glazman

Since v2 is the canonical CodeMirror at this point

Courtesy of Alexey Kolosov