Imported Upstream version 0.21.0
Merge tag 'upstream/0.21.0'

Upstream version 0.21.0
Added new dependencies, the new version use six project for run in python2 and python3
Added command for run the test suite in python3 and command for remove some files generated by running the test suite.
Imported Upstream version 0.21.1
Merge tag 'upstream/0.21.1'

Upstream version 0.21.1
Little improvements in package description
 * Add missing dependencies (strace, python-gdbm, python3-gdbm)
 * Little improvement in package short description
 * Change the url in the Vcs-Git field by the canonical url
Remove the command for run test cases in debian/rules file. It fix FTBFS in pbuilder
Convert debian/copyright file to machine readable.
Update debian/changelog file