Added tslime.vim. for better Vim + tmux integration.
Added Teamocil for automatically creating sessions, windows, and panes in tmux.
Created a default, generic tmux setup with a three-pane split (one big, two small horizontal), .gitignored the rest of the directory as to not track/commit more specific use-cases. Aliased 'mux' to teamocil, so now tmux is ready to go how I like it with just `mux dev`.