Commands: Use `xsel` over `xclip`.

It seems xclip does not close STDOUT after it has read from tmux's
buffer. As such, tmux doesn't know that the copy task has completed, and
continues to /await xclip's termination, thereby rendering the window
manager unresponsive.
Composer: Install "sebastian/phpcpd" and update packages.
Scripts: Install Google Talk into Chromium if the former is available.
Vim: Start a new undo group before changing the buffer.
Vim: Update Vundle submodule.
Vim: Use /bin/bash and not whatever is configured on the machine.
Vim: <C-Space> triggers omni-completion (eclim integration).