* Describe new source-tree directories "verifier" and "webserver", and update descriptions for "node" and "tools".
* Update changelog and release notes for M11.
* Thank Gary Rowe for his contribution to M11.
* Update Copyright and fix some broken links.
* Fix reference to CordaRPCOps class.
* Include changelog for CompositeKey upgrade.
* Fix warnings in changelog
* Update release notes after review.
* Add help for IntelliJ/Gradle.