Fixed INET custom type to work for IPv6; updated tests accordingly
Re-arranged arguments to _choose_available_subnet
Added IP version filter to ipam
Updated tests to use correct API response format
Added context.session.add at end of create_ip_address
Added ip_address parameter to ipam allocate_ip_address
Added TODO
Initial optimization of NVP Driver
pep8 fixes
Added quark session maker
Maybe implemented the zope transactions
Removed all session calls, redundant due to zope
Fixed some conflicts