Merge pull request #1 from tkaefer/master

added slf4j/logback Appender
Increased to version 1.1.0 after merge PR #1
Removed log4j warning in test
[maven-release-plugin] prepare release logstash-gelf-1.1.0
[maven-release-plugin] prepare for next development iteration
Modularization, configurable log message fields for GELF submission.
#2 Added support for log4j v2.0
Code cleanup
#2 Adjusted documentation
Maven site
Update README.md
Update README.md
Bugfix, removed comment markers from arround the Host lookup code
Merge branch 'master' of https://github.com/mp911de/logstash-gelf
Null check: If field value is null, it's not passed to the GELF message
Reformat, added Eclipse formatter config
Added integrative protocol tests using netty
Updated documentation to fix #2
Updated documentation to fix #3
Merge branch 'master' of https://github.com/mp911de/logstash-gelf

* 'master' of https://github.com/mp911de/logstash-gelf:
  Updated documentation to fix #2

Conflicts:
	README.md
	src/site/markdown/examples/jul.md
	src/site/markdown/examples/log4j-1.2.x.md
	src/site/markdown/examples/logback.md