Group creation: Users can create and invite others to an existing private roommate group

[lingelizabeth]

• Add group class to Parse backend
  • Add logic for list of groups to User class
• Create Groups page that allows users to view all groups they are a part
  • All groups you've been added to automatically show up in your groups page
  • Use a GET ParseQuery
• Make the create group modal
  • Add other users (search by username), which updates that users' group list
• Create roommate homepage on group item click
• Add bottom navigation bar and fragments

[lingelizabeth]

I will no longer add a list of groups to the User class by using a Parse Relation in the groups class, which links a group to a list of Users