update README
first pass at 'read the docs' docs
re-work stale connection cleanup (fix handling for tornado 1.x)

There was a problem with connection close being called back directly which caused
the dictionary of connections to change while iterating.
Merge pull request #34 from jehiah/stream_closed_err_34

Error closing stale connections with tornado 1.x
default name to topic+channel
Merge pull request #35 from jehiah/change_logging_name_35

Change Reader default value for 'name' to use topic + channel instead of function.__name__
fix reference to triggering conn in _start_backoff
Merge pull request #36 from mreiferson/rdy_timeout_fix_36

fix incomplete clearing of RDY timeout reference