Added Gitter badge
Merge pull request #1889 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md
Update README.md
Update README.md
fix to allow extension install handler to run correctly
Merge pull request #1890 from rossriley/extension-install-script

Fix to allow extension install handler to run correctly
Fix call chain
Merge pull request #1892 from GawainLynch/hotfix/scripthandler

Fix call chain