Fix emacs-jabber for OSX
Fix sclang-snippets :depends
change sunrise-commander.rcp to :type github
change rainbow-mode to :type github
Add ac-ghc-mod
Add :prepare blocks for some recipes

* recipes/hi2.rcp,
* recipes/hideshow-org.rcp,
* recipes/highline.rcp,
* recipes/rainbow-mode.rcp,
* recipes/workgroups2.rcp,
* recipes/yank-pop-summary.rcp,
* recipes/zencoding-mode.rcp: Add autoloads and/or foo-mode-on functions
  in :prepare block.
Merge pull request #1998 from npostavs/pitometsu-1899

Add hooks for some recipes (1899) v2