Merge pull request #101 from adform/master

Implemented Consumer Cancel Notification support.
testing subscriptionAction.Channel.IsOpen before using channel when re-creating subscribers
Merge pull request #102 from mhanney/master

testing if subscriptionAction.Channel.IsOpen when re-creating subscribers
Initial work to model HA Policies.
Implemented serialization support for RabbitMQ policies.
Implemented support for reading writing and deleting policies.
Added support for reading and writing parameters.
Allow keeping track of slave nodes for queues.
Removed Unset HaMode
Merge pull request #103 from fhalim/SupportReadingWritingPolicies

Support reading and writing policies and parameters in admin API