Release 2.0.0-rc0

Summary:

This is a fairly large rewrite of many parts of the mcollective module
to remove the management of activemq and rabbitmq (middleware) since
this task should be delegated to activemq/rabbitmq modules. See the
examples/ directory for example profiles to replicate previous
configuration.

Backwards-incompatible Features:
- This section should be filled out before final release

Features:
- This section should be filled out before final release

Bugfixes:
- This section should be filled out before final release
Merge pull request #170 from hunner/release_2.0.0-rc0

Release 2.0.0-rc0