dots uninstall

[webdesserts]

Right now, the only way of removing a dot after it's been installed is by manually unlinking and deleting the dot. We should add a dot remove or dot uninstall command that does this automatically.

It would also be nice if there was an --eject option that copied those files over before removing the repo. This would allow you to keep the dotfiles around after uninstall if you just wanted to stop following that repo's changes. Though this may not work as some dots (like velvet) have unlinked files that the linked files depend on. Needs more exploration.