v0.2.3

"Aurea mediocritas"

Notable changes:

• Bump Dataflow Java SDK to 1.7.0 #253
• Update Datastore API to V1 #262
  The current v1beta2 API is being turned off on Sep 30, 2016. Please upgrade ASAP.
• Add compression to Avro sink #260
  Avro file output now defaults to "deflate" codec with level=6
• Use InProcessPipelineRunner #170 #246
  Local and test pipelines will now run with multiple threads
• Add debug to SCollection #248
• Fix some edge cases with BigQueryType #251 #255
• Fix threading issue with Avro Tap #259
• Fix some flakey Algebird tests #264