Add note on contributing to HBase under dev and the newly minted 'beginner' label
HBASE-11535 ReplicationPeer map is not thread safe (Virag Kothari)
HBASE-11667 Comment ClientScanner logic for NSREs.
HBASE-11681 Update and move doc about disabling the WAL (Misty Stanley-Jones)
HBASE-11603 Apply version of HADOOP-8027 to our JMXJsonServlet
HBASE-10205 ConcurrentModificationException in BucketAllocator (Arjen Roodselaar and Chunhui Shen)
HBASE-11611 Clean up ZK-based region assignment