$XDG_CONFIG_HOME/goomwwm/goomwwmrc

I thought it'd be cool if goomwwm would automatically look in $XDG_CONFIG_HOME/goomwwm for a config file.
While poking around, I noticed that goomwwm.md and goomwwm.1 didn't match up. Commit b2183ea should probably be merged in regardless of your opinion of the XDG basedir spec.