integrate code coverage reports in scrutinizer-ci

not sure if we end up using it
another travis config change
drop code coverage for now

Something is broken on travis-ci.org regarding the max execution time
limit and code coverage generation. I have no clue how to solve this, so
I remove this again for test completion's sake.

Please chime in with ideas at

* https://github.com/travis-ci/travis-ci/issues/1837
* http://stackoverflow.com/q/20972248/172068
removed superflous parameter
removed superflous parameter
removed some unused parameters, fixed some docblocks

this file makes me cry. there is so much shit going on here.