Upgrade to Spring AMQP 1.3.6.RELEASE

Closes #54
Upgrade to Spring Integration 4.0.4.RELEASE

Closes #52
Upgrade to Spring Boot 1.1.6.RELEASE

This commit updates the Platform to use Spring Boot 1.1.6.RELEASE in
1.0.x. The Spring Boot upgrade brings with it upgrades to a number
of other projects for which Boot provides dependency management.

Closes #51