Unifying Slf4j, gwt-log, GWT, AppEngine, Part II

After some attempts to GWTify the existing slf4j-api it runs out, the approach of using linking API and implementation will not work in GWT, because it relies on reflection.

Hence, we use a primitive solution without any magic. The API provides the class LoggerFactory and a log implementation is required to register itself via a static method.

Finally I managed to write a first working code base for this. A description about how to use it can be found here.