Add wemux specific tmux configuration.

[docwhat]

It'd be nice if when I launch wemux that it ran a wemux-specific set of tmux commands.

That way I could do things like set the status bar to include wemux status_users and fire up a bunch of windows.

I'm thinking it should be named something like ~/.tmux-wemux.conf or ~/.wemux-tmux.conf so as to not get it confused with the /etc/wemux.conf file format.

Ciao!

[docwhat]

Another good use case for this would be to prevent the SSH_AUTH_SOCK from being updated:

tmux set-option -g updated-environment ""

Ciao!