refs #38 -- contributing, first pass
tiny fixes
other code contribs
refs #38 -- report issue
Merge pull request #80 from jaraco/dist-fixes

Dist fixes
refs #38 -- cleanup
readme link to contributing
closes #38 -- do not forget to add your calendar
Merge branch 'master' into 38-contributing-doc
Merge pull request #38 from novapost/38-contributing-doc

Add contributing.md doc
closes #81 -- European Central Bank calendar
Merge pull request #81 from novapost/81-european-central-bank

European Central Bank holidays -- thx @mcgohier for the suggestion.
Docstring forgotten
do not forget the docstring
contributing: this means you'll have to install requirements
Add Belgium
fix for flake8
Merge pull request #82 from olethanh/add_belgium

Add Belgium
canadian provincial holidays
Merge pull request #85 from atmclarke/mc-canada-provincial-holidays

canadian provincial holidays