Added Gitter badge
Merge pull request #325 from gitter-badger/gitter-badge

Add a Gitter badge to the README
move click marker event handler out of the createMarker loop
Merge remote-tracking branch 'upstream/master'
Merge pull request #327 from Konviser/master

move click marker event handler out of the createMarker loop
Merge branch 'master' into docker-deployment