Switch to solarized for Vim
Turn on mouse support in Vim

This comes in handy with MacVim (which may not need it explicity set
here, but in case I end up using another version of Vim with mouse
support it's good to know it will be on).
Update color support check in Vim

`t_Co` seems to be set to 0 at this point when using MacVim.
`gui_running` seems to be the check that is preferred in this instance.
Use Vim Git Gutter

Some of the color settings appear to be misbehaving, so they're being
repeated here, changed to drop `Dark` when possible.
Make case change mappings put the cursor back

This behavior was in my original attempt at these mappings (6b18c75) but
was removed in 6946bed. Thanks to @dcrosta for pointing this out.
Add mapping to clear Vim search highlighting

Search highlighting can be turned off with `:noh`, but this doesn't
clear the search, it just turns off the highlighting. This mapping will
actually remove the search term to avoid future highlighting.
Use Synatastic for syntax checking in Vim
Add jedi-vim

This plugin allows for some awesome Python autocompletion.