Pynsq

* 161 - fix Python 3.4 protocol error (thanks xiaost)
* 160 - fix Python 3 JSON decoding error (thanks mikolajb)

* 150 - Python 3 support (thanks nickstenning et. al)
* 156 - optimize backoff timer (thanks ploxiln)
* 157 - reuse protocol struct objects (thanks virtuald)
* 158 - optimistically schedule next ioloop read (thanks virtuald)

* 139 - support `DPUB` (thanks iameugenejo)
* 142 - allow infinite attempts (thanks iameugenejo)
* 146 - fix regression in max_rdy_count from `nsqd` (thanks klucar)
* 148/147 - test fixes (thanks nickstenning)

* 129 - fix Snappy `uncompressed` declaration
* 130 - add `SIGINT` handler (thanks jonmorehouse)
* 117 - add `set_max_in_flight()` to replace broken, deprecated `disabled()`
* 126 - add `msg_timeout` option for `IDENTIFY`

* 124 - Tornado 4.x compatibility (thanks mpe)
* 123 - fix exception when `Reader` is stopped before periodic timers start (thanks mpe)
* 121 - trigger the correct `CLOSE` event when socket closes (thanks ellulpatrick)

* 116 - fix `Message.requeue()` `delay` param (thanks bsphere)
* 103 - suppor `ephemeral` topics
* 106/108/110/111/114 - python 3.0 compatibility (thanks ijl)