to get around the verify error on jdk8u20 for ratpack-hystrix:test

see issue 450
New development error page styles

Closes #448
Some more convenience to with.
Some tweaks to URL building.
Add convenience for get requests with no configuration.
Fix escaping issue with path segment patterns.
Merge pull request #463 from robzienert/new-error-styles

New development error page styles
Fix GitHub API requests for site.
Provide a throttle for generic operations.

Closes #449.
Upgrade to latest RxJava.
Fix problems with defer(), and add extra promise operations useful for diagnostics.
Add a mechanism for dumping out current executions.
Add API for decorating Response before sending.
Merge remote-tracking branch 'upstream/master'
Allow setting a read timeout for HTTP requests.
Ensure that cached promises resume subscribers on their execution.
Add ratpack-jackson-configuration module (#212)

This also includes making DefaultLaunchConfigFactory work properly based on LaunchConfigs.
Support for polymorphic config is included.
The jackson configuration factory doesn't yet support property/environment variable overrides.
Merge branch 'master' of github.com:ratpack/ratpack

Conflicts:
	gradle/dependencies.gradle
Tidy up of the throttle stuff.
Allow using jackson config without requiring a custom main class (#212)

You can now specify both the configuration class and configuration file via ratpack.properties.