treat cython output as binary with .gitattributes
Makefile: detect when running interactively
Makefile: detect Mac OS and use open instead of xdg-open
fail if less than 100% coverage
add coveralls
add coveralls badge
install nose with pip
coverage: ignore root
test-coverage: do not open browser on travis-ci
update start line of readme in docs
missing coverage of testdata
missing coverage of testdata
Merge pull request #121 from ndawe/master

[WIP] add coveralls