screen rotation script with wacom tablet rotation and font rendering adjustment

( Update: now available on github: https://github.com/fdietze/rotate )

1. Put this script in ~/bin:
   https://raw.github.com/fdietze/rotate/master/rotate
2. Make it executable.
   chmod +x ~/bin/rotate
3. Log out. Log in.
4. Use it in the Terminal.
   rotate inverted
5. Create a Shortcut for easy usage.