Add Rates to nsqadmin via graphite in an async fashion
Add check for broadcastAddress in lookupd_utils
Merge pull request #143 from jphines/rate_143

nsqadmin: add message rate
nsqlookupd: dont always remove topic registrations
bump to 0.2.18-alpha
Merge pull request #150 from mreiferson/lookup_topic_disappear_150

nsqlookupd: topics disappear with channel UNREGISTER
nsqlookupd: channel UNREGISTER test
Add extra table cells
Merge pull request #152 from jphines/add_table_cell_152

Add Blank Table Cells on Channel Message Queues in NSQadmin
Merge pull request #151 from mreiferson/lookup_tests_151

nsqlookupd: channel UNREGISTER test
nsqd: in_flight_count should be a gauge
nsqadmin: fix large graph formulas
Merge pull request #153 from mreiferson/graphs_153

nsqadmin: fix large graph formulas
nsq_tail: an example reader to make it really easy to 'tail' a topic with an ephemeral channel
Merge pull request #154 from mreiferson/nsq_tail_154

nsq_tail
nsqd: V2 always sends heartbeats
Merge pull request #131 from mreiferson/heartbeats_131

nsqd: heartbeat for producers
nsqlookupd: store tombstone data per registration, not producer
Merge pull request #148 from mreiferson/tombstones_148

nsqlookupd: tombstones are producer not registration based
update changelog