Initial work to add partition info (bug 860846)
Fix 'partition' protobuf declaration.
Improve 'version' detection
Merge branch 'master' into bagheera-partitions

Conflicts:
	src/main/java/com/mozilla/bagheera/http/SubmissionHandler.java
	src/test/java/com/mozilla/bagheera/http/BagheeraHttpRequestTest.java
Add the api version and partition info to POST.
Add apiVersion and partition to SubmissionHandler.
Add a test to run the Bagheera service

Run an instance of Bagheera and send messages to it using ReplaySink. Used to
make sure partition and api version information are making their way through
at least as far as the producer.
Merge branch 'master' into bagheera-partitions
Add a test for deletes with partition info.
Merge pull request #22 from mozilla-metrics/bagheera-partitions

Bagheera partitions