Fix github references

We should be referencing git.openstack.org at this point. Also, there
were some dead links in the README file.

Change-Id: I08afe59e9405c530e5c8cc8512e029dcd00169d0
Remove version from setup_requires

setup_requires cannot effect an upgrade, but a version being listed can
block things from operating happily. Remove the version pin from
setup_requires. Also, the setup_hooks are no longer needed.

Change-Id: Idda7d67a21c9245ca8c17973e847629bd3b4e3f2
Merge "Fix github references"
Merge "Remove version from setup_requires"