Multithread testing- travis

[wiredfool]

This is the second half of #732, and a companion of #754

This doesn't work with coveralls. There is some sort of error that needs to be fixed somewhere in the coveralls package.

Coverage does work, with the nose-cov plugin.

[hugovk]

This doesn't work with coveralls. There is some sort of error that needs to be fixed somewhere in the coveralls package.

This should be reported to the package we're using, coveralls-python:
https://github.com/coagulant/coveralls-python/

I just spotted there's a second coveralls package, python-coveralls. Perhaps this'll give better results:
https://github.com/z4r/python-coveralls

[hugovk]

Any particular reason to remove pyroma from Travis CI? It'd be good to keep it to make sure #743 passes on Travis to avoid regressions of #740.

[wiredfool]

I've tried the other coveralls package, it fails in other interesting ways. I'm going to isolate what's going on with a test case before reporting. I think it's this issue: TheKevJames/coveralls-python#43 but I'm not sure.

Pyroma was an oversight from the manual split after the merge.