mongo.Collection#find

Update the find method of the Collection subclass to massage the kwargs
with the replicaset arguments such that the returned Cursor respects the
MongoReplicaSetClient settings.
Bump version
Added test coverage
Merge pull request #1 from battand/master

Added test coverage
updates tests to work around humongolus list syntax
Merge pull request #6 from DiscoveryHorizon/master

Update tests to show more array implementations