Imported Upstream version 6.3.0
Merge tag 'upstream/6.3.0'

Upstream version 6.3.0
Add the awesome patch by Chris "kwpolska" Warrick (add install_bs3 command) (Closes: #734613)
Add bash and zsh completion
Use pybuild as buildsystem
Fix gen_completion (not using doit any more), invoking nikola directly
to generate the completions.
Update debian/changelog file
Imported Upstream version 6.4.0
Merge tag 'upstream/6.4.0'

Upstream version 6.4.0
Update patch of the custom debian install_bs3 command
Update debian/changelog file
Imported Upstream version 7.0.1
Merge tag 'upstream/7.0.1'

Upstream version 7.0.1
Update patches
Update patche to add install_bs3 command
Add html5shiv.js to debian/missing-sources
Update debian/copyright file
Remove depends on python-tz and add depends on python-naturalsort
Update debian/rules
Update debian/changelog file
Remove patch to replace naturalsort by natsort because doesn't work with
galleries. So I packaged python-natsort and upload to debian