Added a clean up of Expression&*.class files

The cleanup should keep the class files from building up over time.
Fixed missing escaped char.
Add some global configuration so that any projects that internally use the Gradle plugins build against the latest source.
Add the first of a few "performance test" projects useful for benchmarking Ratpack.

This one is the simplest (and fastest) possible Ratpack application and is useful for benchmarking the Netty usage.
Merge pull request #57 from beckje01/cleanUpTask

Clean up task
Some tweaks to the cleaning up of expression files (from Springloaded).
Use the project path to identify the runner in IDEA.
Some incomplete Javadoc for Handler.
Minor optimization to avoid creating an error handler per request.
Minor optimization to avoid list creation.
Optimization to avoid list creation.
Reset to use Netty defaults as per the examples.

I don't perceive any change in performance having them there, so safer to go with the defaults.
Add convenience get handler to Java API.
Add another sample app that exercises the routing, barely.
Force these dirs to exist.
Put the handler under a URL to exercise the mapping code.
No need to create a module just to instantiate a handler.
Add a perftest for benching the cost of dependency injecting handlers.
Some config improvements for the perftest samples.
border for the promo box