Mode-line handling.

 - Move custom mode-line format string into a variable.
 - Helpers to toggle the contents of the mode-line.
 - Don't try to access/update it from eshell.
Binds gnus.
Alternative bindings for {beginning, end}-of-buffer.
Fixes a typo.
Increments auto-complete candidate menu height.
Switch to ELPA notmuch.
Ignore cached requests.
Diff/commit highlighting in GNUS.
Gnus: Toggle between HTML and plain text.
Organize Gnus configuration.
Adds flymake-easy dependency.
Updates color-theme module.