Add channel sampling support
Merge pull request #57 from elubow/sampling

Add channel sampling support
add an example client, nsq_to_nsq.py
fix travis
Merge pull request #60 from mreiferson/fix_travis_60

fix travis
moving module version into separate file
adding user_agent string to IDENTIFY
Merge pull request #58 from elubow/user_agent_string

adding user_agent string
Merge pull request #59 from ploxiln/nsq_to_nsq

add an example client, nsq_to_nsq.py