Registry now returns nil when key not found
Config fetch method now always has a default value
Registry can now be reset
Changed acceptors and notifiers to work with bunny 0.9
Implemented host-bound bunny pool
Make sure a queue is bound to an exchange
Adapted mocks to new situation
Formalised gem versioning and incremented to 0.3.0
Lock celluloid version
Lock rubygems version for travis
Remove travis yml change, since it doesn't change anything

Revert "Lock rubygems version for travis"
This reverts commit b1bee89ef8990fa1aea1dd18b294329cbffae013.
Removed deprecated version file and update gemspec
Let's not initialise the registry twice
Merge pull request #11 from jwkoelewijn/switch_to_amqp_0.9.1

Switch to AMQP 0.9.1