Turns out importlib isn't part of python 2.6. I added a note to the README.
Pass in a database connection to {get_new,free}_network_id

This solves a problem where an ID could be allocated, and then the system
could crash before it was assigned to a network, causing an ID leak.  Now both
operations are in one transaction.
Document reason for previous change
Got rid of deprecated available bit on model.Node.

Its presence threw me when writing the query api stuff; other things
aren't using it, but checking if project_id is null. I wrote some tests,
removed the attribute, and made the appropriate fixes.
Merge pull request #167 from gsilvis/driver-db-pass

Pass database connection to network id allocation/freeing
Merge pull request #168 from zenhack/centos-importlib-doc

Turns out importlib isn't part of python 2.6.
Merge pull request #169 from zenhack/available

Got rid of deprecated available bit on model.Node.