Added from @purcell, some modifications
Direct copy from @purcell emacs.d
from @purcell, added git-gutter-fringe (w/colours)
Added: bug-reference-github, git-blame, git-gutter-fringe,
git-messenger, gitignore-mode, magit-svn, mwe-log-commands, yagist, wgrep
Moved magit keybindings to init-git.el
Added init-benchmarking, new libs, osx is-a-mac check