Merge pull request #18 from matthias-k/travis_with_conda

Travis with conda
Added some debug questions
debugging in descriptive
Merge pull request #17 from philippberens/master

debugging descriptive
rayleigh test
Merge pull request #19 from philippberens/master

rayleigh test
Setup for coveralls

Signed-off-by: Matthias Kümmerer <matthias@matthias-k.org>