Merge pull request #2 from alkemist/master

Remove some unused stuff, and implement logout.
Add 404 err handler
Add Getting Started
Use request.text to capture post
Small change to web form processing
delete return because clientError already did that
Reomve return will throw IllegalBufferAccessException
Add simple log, will create LoggingModule later
Change 404 to 405 to comply with MethodHandler.java in Ratpack
Display error when post failed.
Remove tail 405 handler, not needed.

A 404 will be raised automatically when then request hits the end of the pipeline.
Add a logging handler.
Make templates reloadable during development.
Add a custom error page handler.