Enable preview of markdown files
Add vim-altr to switch between *.c, *.cpp, *.h etc.
Add manpageview as NeoBundleLazy
Configure ref.vim to open man pages for sh, zsh, and bash filetypes
Customize QuickRun so that it communicates with Wandbox

Also use quickrun hooks to output compile error to unite.vim
Remove unused key bindings for closing braces/brackets/parentheses
Change key bindings for changing pwd to buffer directory
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