Move tests outside source
Install pytest-cov
Fix for #12
tackle #17
close #20

For the record enum is not always a integer so I can not change the Note type to
colander.Integer
https://www.iana.org/assignments/ipp-registrations/ipp-registrations.xhtml#ipp-registrations-6
more ignore
Merge pull request #45 from ticosax/master

Tackle some issues