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.
Defaults to true, and allows turning on/off cljs compiler `*cljs-warn-on-undeclared*` flag. See #62.