Fixed issues with code
Removed add command and updated help functionality
Updated issue with help and added to-implement commands
Fixed issue of not saving rota when called from Slack
Added skip functionality to skip current shopper for today
Move to vendor namespace and use autoloading instead of including files manually.
Merge pull request #1 from orukusaki/feature/vendor-namespace

Move all classes to vendor namespace
Added DateValidator class for checking if the supplied date is valid
Added cancel functionality
Merge branch 'feature/cancel-lunchclub' into develop

* feature/cancel-lunchclub:
  Added cancel functionality
  Added DateValidator class for checking if the supplied date is valid
Fix issue unable to cancel dates not in rota
Maintain shoppers order determined by current rota
Removed spurious second argument to Shopper constructor
Fixed issue with lunchclub members disappearing
Allow to specify number of days to return rota for
Generate rota based on end of rota
Allow for lunchbot test channel