Add current virtualenv to prompt.
Modify colour scheme.
Fix vim -> mvim alias.
Delete vim -> MacVim aliases.
Use vim as system editor.
Add CtrlP settings.
Remove ctrl-p view shortcut.

Conflicts with standard CtrlP shortcut, and I never
use it anyway.
Configure airline colour scheme.
Add CtrlP and Airline. Remove lots of unused plugins.
Update dotfiles location to new 'Data' partition.
Update location of 'env' folder.
Merge branch 'develop'