Renamed init-auto-complete to init-completion
Make it a bit harder to trigger company-mode

It's a little bit slower than auto-complete, and so my original setting
was causing some lag.  Now it'll trigger after two characters, rather
than one.
Added/rethought some keybindings

Notably, commands that relate to editing (whether it be navigating
the current buffer or such) are on ,e and commands to search
documentation are on ,d.
Open calculator with ,c