Add ClickHelp to real-world uses
Add a command-line code highlighting tool
Disallow line wrapping in gutter container

This prevents gutters from suddenly moving below each other as the
editor is scroller horizontally.
[runmode.node addon] Include null mode
Add cursorScrollMargin option
[manual] Add specific section for constructor and CodeMirror.defaults

Issue #1473
[manual] Fix inaccurate type annotation

Closes #1478
[haml mode] Add new mode
[haml mode] Integrate
Remove TextMarker.getOptions

It's hardly useful, error-prone, and too clunky.
Add TextMarker.changed method
Update and merge codemirror