tmux 1.9 changes

* #[A-Z] format specifiers deprecated
* foo-{fg,bg,attr} deprecated

Reference:
http://sourceforge.net/p/tmux/tmux-code/ci/1.9/tree/CHANGES

Signed-off-by: Lance Chen <cyen0312@gmail.com>
Set title string to window name

Signed-off-by: Lance Chen <cyen0312@gmail.com>