Merge pull request #482 from portertech/keepalive

Improved stale client checking, fixed keep-alive check history & flap detection.
[beta] beta version bump
Merge pull request #483 from portertech/beta

[beta] beta version bump
[changelog] updated changelog w/ keepalive check fixes
Merge pull request #484 from portertech/changelog

[changelog] updated changelog w/ keepalive check fixes
[reconnect] improved unsubscribe & server rabbitmq connection reconnect
            - used before_reconnect queue callbacks to handle consumer clean up
Merge pull request #487 from portertech/reconnect

[reconnect] improved unsubscribe & server rabbitmq connection reconnect
[extension-stop] provide an extension stop hook, tread carefully
Merge pull request #486 from portertech/extension-stop

[extension-stop] provide an extension stop hook, tread carefully
[beta] beta version bump, updated changelog
Merge pull request #488 from portertech/beta

[beta] beta version bump, updated changelog
[api_bind] honor api.bind option. default to 0.0.0.0
http status codes 201 & 202 should return a body
let's rename response_json to response
api spec should no longer test for empty bodies on HTTP 201 & 202
creating a stash should return time issued
Merge pull request #489 from blueboxgroup/api-bind

[api_bind] honor api.bind option. default to 0.0.0.0
[bind] api bind, do not mutate settings
[validate] ensure check standalone is boolean (if set)
[eventmachine] new version of em, binary builds for windows and fixes