Add auto-complete-clang-async recipe

https://github.com/Golevka/emacs-clang-complete-async
Merge pull request #714 from yasuyk/auto-complete-clang-async

Add auto-complete-clang-async recipe
add org-present recipe
Merge pull request #715 from scvalex/add-org-present

Add org-present recipe
Add recipe for ido-sort-mtime
update haskell-mode recipe to include "logo.svg"
Merge pull request #717 from scvalex/haskell-mode-explicit-files

Update haskell-mode recipe to include "logo.svg"
Merge pull request #716 from pkkm/master

Added recipe for ido-sort-mtime
add widget-mvc recipe
Merge pull request #718 from syohex/widget-mvc

add widget-mvc recipe
add open-github recipe
Add sclang-extensions

/cc @chrisbarrett
add prefix 'helm-'
Fix for new name
Merge pull request #719 from syohex/open-github

add open-github recipe