Prepared for upstream integration

Migrate build to pbr. Add tox.ini file. Removed debian dir.
Fixed pep8 errors
Make unittests work with testr
Move tests under module

Also, while we're at it, clean up some bogus license headers.
Install bash completion calls
Rename generate man page command

build_manpage is more obvious than create_manpage as most python
setuptools around generation of output ready for install are prefixed
with 'build_'.
Add acknowledges file

Note those that rendered a great deal of assistance and prioneered
development that might not be otherwise recognised.
Merge pull request #1 from electrofelix/sync-for-openstack-contrib-1

Sync for openstack contrib 1
Fix test_lesser_minor unit test 

Fix failing test if minor and revision are 0.