nsqlookupd: dont always remove topic registrations
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