greenmail fixture helpers in source

[kurt-o-sys]

Greenmail helpers are in the test-directory. This means: they are not present in the maven repo. It would be really nice to have the helper functions for integration testing in the src-directory somewhere (probably under clojure-mail/testing or something). A testing-library does fit in the main project files, imho.

[amoe]

This would be really handy for me also.