FLUME-2190. Add a source capable of feeding off of the Twitter Streaming API

(Roman Shaposhnik via Hari Shreedharan)
FLUME-2182. Spooling Directory Source will not ingest data completely when a wide character appears at the edge of a buffer

(Sven Meys via Mike Percy)
FLUME-2198. Avro Source should disable itself if ipFilterRules contains invalid rules

(Hari Shreedharan via Mike Percy)