Cleanup licence and attribution headers

Fixes issue #6.

I removed the old headers, and any @author docblock tags and replaced them with the format used in MageSpec.

I have referenced the project as 'Mage-Test' still, when we decide on the rename, I'll go through and amend these references.

I have made a few (4-5) formatting changes to comply with PSR-1.

I also removed what I feel is dead code, specifically the stubs relating to mink, behat and phpspec which now have their own projects.