First take on Groovy DelegatesTo/Testing sections
added HttpUriBuilder interface to main.java.ratpack.http and DefaultHttpUriBuilder class to main.java.ratpack.http.internal.
included new test class in the http internal tests package.
made changes to meet code style guidelines
added functionality for params and added multiple tests
added name and url to contributers list
#342: first cut of redirect() implementation
#342: implemented the rest of the interfaces for both Groovy and Java, together with a basic test
Link to versioned Rx Javadoc.
#342: added JavaDocs and now checking that the status code is an actual redirect one
Remove add() methods from Registries.

Closes #352.
Upgrade to Rx 0.19
Implicitly consider the execution complete when there are no more segments and the last segment did not initiate an async operation.
Support for forking execution.

Closes #353.
Install a Ratpack aware computation scheduler when using Rx.

Closes #354.
Make ExecController.getNumThreads() return the right value.
Fix thread count handling.
Add some extra escaping support.
Support retrieving generically typed model items.
Bump lazybones-gradle version to 1.0.4
Add more test coverage for existing file compression behavior (#336)