AMQP-345: Polishing

* `declareQueue(Queue queue)` returns the name of the declared queue
* Add documentation
* Upgrade to Gradle 1.10
* Add `-options` to `-Xlint` Java arg to suppress bootstrap CP warning from Java 7 for Java 6 source code
* Add Gradle's `wrapper` `distributionUrl` to download `all` facet.
It allow to use Gradle source code from IDE.
Actually the IDE suggested to do that.