Add config file for Ack.
Add 'git stepback' alias.
Add coffee-mode for Emacs.
Improve js2mods-maybe-delete-trailing-whitespace.

Turn this also off in docs.sencha.com/repos
Remove the whole Portage thing from conf.
Merge remote-tracking branch 'origin/master'
Add rebase extension to Mercurial.
Switch .emacs back to Linux font.