Add vim .netrwhist to gitignore
Add sublime symlink to bin
Improved prmopt coloring, git stuff, cleanup.
Cleanup gitconfig, nicer log graph.
Add public/private paths to .profile; add WDI convenience.
Set tmux default-terminal to screen-256color

Even though `echo $TERM` in tmux already returned "screen-256color",
doing this is necessary to prevent tmux screwing up prompt colors when
it sources .bashrc the first time. Sourcing .bashrc again would fix
them. I have no idea why they broke or why this fixes it.
git automatically does tabs in config so let's do that
retab gitconfig