[meta] Ignore .vagrant

Ignore leftover stuff from Vagrant testing.
[meta] Bump powerline
[meta] Bump vim bundles
[tmux,vim] Fix status line background colors
[terminal] Update Terminal.app profile

Change the background color to be Solarized black02.
[meta] Update submodules
[meta] Vagrant

Initial scratch work for being able to test using Vagrant.
[meta] Don't check host keys when SSHing to Vagrant
[vim] Ignore .scratch and .VimballRecord files
[meta] Only do SSH conf if local, handle Debian