AMQP-83 Reference Doc + JavaDoc fixes - Dist fixes
* Use Docbook XSDs rather than DTDs --> substantial speedup
* For Java Doc follow the same structure as Spring Integration
* Make sure the distribution package's files match the files from the Maven build, e.g. Schema files, license files etc
AMQP-83 - Rename src/docbkx to src/reference
* Remove src/dist/distribution.xml
AMQP-83 Gradle Conversion - Cleanup
* Delete unnecessary Docbook resources
* Update Wrapper to Gradle 1.0 RC3
AMQP-83 - Remove Mavem POM files
AMQP-83 - Update Spring version to 3.0.7 as per AMQP-238
AMQP-83 Rebase with latest commits from master (After 1.1.1 release)
AMQP-83 Code Review
* Remove Bundlor Plugin
* Update README.md
* verify created *pom.xml* files after *gradle install* execution that dependencies match
* ensure that *dist* task is executed by default
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