Merge branch 'release/0.13' into develop
Merge branch 'master' into develop
Merge branch 'master' into develop
selenium is not installed when running the tests on travis.
fixes #25
make waitress happy with our HTTP headers
update dependency
workaround to prevent internal server errors on non-reproducible bug.
bug is not reproducible
turns out, in python3 str is required.
code cleanup: better test coverage for exception handling.
bumbed version number
Merge branch 'release/0.13.1'