chore: fix autopep8 whitespace issue
fix: cassandra driver

Joins are not allowed in cassandra. This patch fixes an issue with the
cassandra driver and allows the driver to work against a real running
cluster.
tweak: use in-memory sqlite driver

This patch changes the default config to use the in-memory sqlite
driver. This is far faster than using a file on the disk and speeds up
test execution time considerably.
test: adds test for assignment scenarios

This patch adds a test for assigning blocks before and after registering
the blocks. We may make a decision down the road to change the
definition of this behavior (and thus the test this patch introduces)
but for now it's best to test this behavior so that it's defined.
tweak: adds creation of keyspace to schema.cql

This patch tweaks the schema.cql to allow a user to simple do:

cqlsh < path/to/schema.cql In order to create the schema on their
cluster.
fix: dynamic importing with datastax driver

This patch fixes a bug whereby the real datastax driver can't be used
becausee of the manner in which it is being imported. The cluster
submodule must be loaded specifically, then the cluster object can be
insantiated.
fix: mocking.

This patch fixes mocking that was broken by a previous commit to make
the real datastax driver work
fix: cassandra on python 3.4, pep8

This patch fixes dynamic importing error of mock cassandra on Python 3.4
and Pep8.
Merge remote-tracking branch 'upstream/master' into fix_cassandra_query

Conflicts:
	deuce/tests/mock_cassandra.py
test: adds a test for missing blocks finalize

This patch adds a test for finalizing a file when blocks have been
assigned to a file but not registered.
fix: finalize with unregistered blocks (cass)

This patch fixes the scenario when blocks have been assigned to a file
but not registered. The driver should treat the blocks as though they do
not exist at all.
fix: finalize w/ unregistered blocks (mongo)

This patch fixes an issue with the mongo driver when trying to finalize
a file with blocks that have not been registered.
Merge pull request #67 from painterjd/fix_cassandra_query

Project Cassandra Tweaks #1