skinny 1.3.4 (new formula proposal)

This is new formula proposal. Skinny Framework is a famous web framework in Scala.
http://skinny-framework.org/
We already supports homebrew installation from our alternative repository for months past.
https://github.com/skinny-framework/homebrew-alt

Thank you in advance.
Can a test be added to do something more substantial than e.g. `--version` or `--help`? See `cmake.rb` for an example of an application formula with a good test and `tinyxml2.rb` for an example of a library formula with a good test. Thanks!