Merge pull request #598 from portertech/beta

beta version, 0.11.0.beta
[redact] improved support for redacting sensitive client key values
         - clients may specify their own redact keys
[oj] bumped the version of oj, the json parser, speed
Merge pull request #601 from portertech/redact

[redact] improved support for redacting sensitive client key values
Merge pull request #602 from portertech/oj

[oj] bumped the version of oj, the json parser, speed
[amqp] bumped version of the amqp library to 1.0.0
Merge pull request #603 from portertech/amqp

[amqp] bumped version of the amqp library to 1.0.0
[amqp] patched amq-client send_heartbeat(), don't send frames on closed channels
[amqp] reconnect on skipped heartbeats
Merge pull request #604 from portertech/amqp

patched amq-client send_heartbeat(), reconnect on missing heartbeats
[beta] minor beta version bump, updated changelog