added drop collection and collection name fetch from db.
add ability to "drop a db" it still hangs around due to emongo's
connection, but ill get something in place for that in a bit.
ok, found the part of the unit test bringing my dropped db back to life
ok, cleaned up
oops.
lets just drop the db after the test.
dont require collection name to be a string.
Merge pull request #1 from reflexsystems/master

i have no idea if you want these changes or not