I removed the "%" and :beep special handling. I think there are very few people using these, and they make things harder to maintain. They are very easily emulated with a simple shell script. Note that I bumped the minor version due to this being a slight backwards incompatibility. Closes #79.
Things are actually in a vaguely working form, but I need to write a lot of documentation and clean up the advanced example more before this is ready for prime-time.