Fix deprecation warning for Stopwatch.elapsedTime
Move source files into package net.gini.*
Add configuration setting includeFullMDC

The `includeFullMDC` configuration setting allows including the complete contents of the MDC.

See https://github.com/Moocar/logback-gelf/tree/logback-gelf-0.10p1#additional-fields for details.
Add support for static additional fields

The `staticFields` configuration setting allows adding additional static fields to all GELF messages.

See https://github.com/Moocar/logback-gelf/tree/logback-gelf-0.10p1#static-additional-fields
Add configuration setting useMarker

The `useMarker` configuration setting allows sending SLF4J markers (http://slf4j.org/api/org/slf4j/Marker.html) as additional field in GELF messages.
Add configuration setting shortMessagePattern

The `shortMessagePattern` configuration setting allows modifying the layout of the short message
Add configuration setting useServiceName

The `useServiceName` configuration setting allows using the Dropwizard service name as logging facility in GELF messages.
Update README.md file