.vimrc: Moving back to "Tomorrow-Night" theme. It just behaves better.
.ctags: Adding ctags for scala
.vimrc: Setting the leader and localleader explicitly.
.vimrc: Faster git gutter updates.
.vimrc: Automated Tag Generation

Installing EasyTags and configuring it to deal with Haskell tags, using
lushtags.

Also making sure EasyTags doesn't use the global tag file, this just
doesn't seem to be a great idea to me.

Finally, added `tags` as an ignored file in the global gitignore.