First cut at exporting the configuration
Replaced MapToJSONConverter with ObjectMapper
Extracted Configuration class
Moved configurationMap creation to Configuration#toMap
Added tests
* Implemented GUI portion of loading a configuration file
* Started server side of loading a configuration file
* removed unused parameter in StubFactory#createStubFor and MatcherFactory#buildMatcher
* Extracted PopulatingMap populators for uriHandler and shunt/stub map
MatcherFactory replaced with WhenMatcher(Map)
* Replaced StubFactory with factory method on AbstractStubRequestHandler
* Added tests for ConfigureStubResource
Refactored AbstractStubRequestHandler.createStubFor - pushed deserialization into Map constructors for subclasses
Replaced ShuntRequestHandler(URL) with ShuntRequestHandler(Map)
Finished loading code
Made load activity atomic (synchronized reset and putall)