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