refactoring some instances of 'meetup' to 'meal'
'finalized' meal model, added 'placeID' which will be taken from Google. 'key' will be a combination of placeID and time, and it will be generated on the client
adding user model and server controller for it
Merge branch 'master' into mealModelWork
refactored all instances of 'meetup' to 'meal'. Not sure if this is necessary, but did it anyway.
Merge pull request #4 from nfeliciano/mealModelWork

Meal model work