get rid of synch block around @notifier call, since gelf gem is now threadsafe
require gelf 1.4.0 or greater
Merge pull request #6 from ping4/non_synched_notify

Non synched notify
bump version
Updated changelog
Merge branch 'master' into lograge_compat

Conflicts:
	lib/log4r-gelf/gelf_outputter.rb