Add browse-kill-ring package
Adds comments to sample modules.
Updates key chord bindings.
Merge pull request #457 from climatewarrior/updateKeyChords

Updates key chord bindings.
Merge pull request #456 from climatewarrior/add-module-docs

Adds comments to sample modules.
Enable browse-kill-ring's default keybindings
Merge remote-tracking branch 'refs/remotes/bbatsov/master'

* refs/remotes/bbatsov/master:
  Enable browse-kill-ring's default keybindings
  Updates key chord bindings.
  Adds comments to sample modules.
  Add browse-kill-ring package