Merge pull request #57 from maman/master

fix multi-monitor resolution detection on OS X
Removing all of the theme exporting code. I've never seen anyone use it and haven't used myeslf in quite some time.
Disk usage added for *BSD and GNU/Linux-related outputs. OS X not added yet.
Totally forgot to add back in the 'DE Not Present' conditional. My bad.
--help moved to printf.
For now disk output is completely suppressed on Cygwin and Mac OS X.
Nevermind! @spaghetti2514 helped me out with it.
Welp. I'M AN IDIOT.
Fix for WM detection in OS X.
Fix for if you're running an X server inside of OS X.
Fix case for I3 instead of i3. The detectwm function should take care of this anyways, but...whatever.
Version change.
Fix for the BASH pre 4.0-ish lower-to-upper in WM detection.
Attempting to fix elementary OS detection.
Further fix for elementary OS detection.
Hell with it, might as well just throw in release # as well.
Elementary OS package detection.