readable 1.0.0

A preprocessor for an alternative Scheme syntax.

I'm not sure how to test in a formula for presence of another system configuration (the one necessary for the Common Lisp-enabled version of this package), so I've only configured it the way it seems to usually be used (on top of Guile / Scheme.) If you think this should be added, there's information here on how to do so: http://sourceforge.net/p/readable/wiki/Install-howto

Ditto, not sure how to write more in-depth tests (would need to compare input and output files, etceteras): if you can point me to a Formula that does similar compile-and-test-resultant-files stuff, so I can copy/adapt it, I'd be happy to add that to this pull-request.