TMUX: fix $PATH
TMUX: share clipboard on paste
TMUX + VIM: enable switching between Vim and Tmux panes seamlessly with C-hjkl
VIM: stop adding very magic modifiers to regexes automatically
VIM: use The Silver Searcher (Ag) with Ack plugin
VIM: Use Ctrl-P instead of Command-T
VIM: Fix cursor when running inside Tmux