Added some new more intuitive tmux key bindings

Ctrl-Shift+t     -> new window
Ctrl-Shift+w     -> close current window
Ctrl-Shift+e     -> vertical split
Ctrl-Shift+o     -> horizontal split
Ctrl-Shift+left  -> move current left
Ctrl-Shift+right -> move current right

Signed-off-by: Nick Diego Yamane <nick.yamane@openbossa.org>