Added rate limit handling for rtm connections

- You can now tell the RTM client to automatically reconnect by passi…

…ng `auto_reconnect=True`

Version 1.1.3

s

Version 1.1.2

Version 1.1.1 Release

1.1.0 Release

v1.0.7

Release 1.0.6 (slackapi#187)

* Release 1.0.6

* Rebuilt docs for 1.0.6