Add berlin group
fix the groups copy at the top of the page and add info about starting a new group
Merge pull request #10 from mortice/berlin

Add berlin group
fix merge conflicts
Merge pull request #11 from mortice/berlin

Add berlin chat channel details
few german correction
Merge pull request #12 from lucaspinto/gh-pages

few german corrections
'Berlin' is not German for 'East London'