nsqd: remove locks on topic messagePump()
nsqd: dont dupe msg for the first channel
nsqd: reduce garbage shown in escape analysis
nsqd: no copy message ids
update README benchmarks; add some GUID benchmarks
guarantee ordering of deletion when topic is live
nsq_stat: check errors
update comment
fix counter page
Merge pull request #187 from mreiferson/nsq_stat_errors_187

nsq_stat: error handling
Merge pull request #188 from mreiferson/counter_page_188

nsqadmin: fix counter page
Merge pull request #182 from mreiferson/active_deletion_182

nsqd: deleting a "live" topic
Merge pull request #176 from mreiferson/optimizations_176

nsqd micro-optimizations