Fix tmux, change vim/tmux navigation to ctrl + dir

Added new tmux bindings to revert 1.9 changes to go to current directory
instead of root. Added vim plugin and tmux config to use ctrl + h|j|k|l
to go between both vim splits and tmux panes seamlessly. Cleaned up some
bindings, rebound ctrlp to ctrl+p instead of <leader>p. <leader>e now
goes to relative file where <leader>s goes to root both accepting hjkl
directions.