Merge pull request #138 from Cerberus98/routes_submod

Routes submod
Merge pull request #139 from Cerberus98/subnets_submod

Subnets submod
Merge pull request #140 from Cerberus98/networks_submod

Networks submod
Moves quota config back to plugin

Moves the quota configuration lines back into plugin.py which in turn
solves a weird dependency issue when loading the Quark quota driver via
the neutron.conf.