Minimal working metadata from CqlResult objects.
Fix lint.
Only unmarshal based on the CqlResult.schema metadata.
Don't unmarshal anything from the validator cache.
Now that we inspect the metadata in the CqlResult we can skip trying to get the metadata from the Keyspace Definition.
If the type is None it won't ever be in unmarshallers.
selectRe was unused.
_validators was unused.
re is now unused.
CqlMetadata should never be empty.
Explicitly test handling of unknown types.
Merge pull request #11 from rackerlabs/cqlresult-schema-metadata

Minimal working metadata from CqlResult objects. (ready)