Fixing timezone problem in ical files

Initial 1st hotfix. - Further work to be done
Added comment to clarify intention
Merge remote-tracking branch 'upstream/master' into wiki
replaced 'moment' by 'moment-timezone'

You should update your node-module. Delete 'mongo' and 'mongo-timezone'
and do 'npm install'
Merge pull request #318 from leider/wiki

Fixing timezone problem in ical files