Initial work on tweaking the gem to support multiple neo4j instances.
Some work on hacking up this damn gem to actually work. Seems the
gremlin plugin for neo4j is borked, or doesn't like 2.0, or something.
Anyway, this thing needs the rest of it's gremlin scripts replaced,
which means I have to learn cypher. That's a project for tomorrow.
Reverting db cleaner script from cypher back to Gremlin.

I realized that gremlin (and more) was borked because neoid doesn't support neo4j
2.0 yet, and I was trying to run it against that. Downgrading for now as
we want proper support.
Fixed nearly all of the existing unit tests.
Fixed some issues with initializations to get all tests passing, and
added a couple tests to cover the new ability to select a connection
from the pool.
Minor cleanup and readme updates to reflect changes.