Revert "Add Guest functionality"

This reverts commit aec5034347f13166141a834229d5b92bed66bf68.

Conflicts:
	db/schema.rb
Add current user function for readability throughout user controller
Modify game controller
Modify users controller file

-Add current user method throughout the code
-Add condition for user in create method to allow guests to play game
Setup user model to validate empty parameters to allow guest to play

-create new_guest method that will create new user
Remove unnecessary move to method
Add new.html.erb login form
-Takes username and password
Add button Play as Guest! that'll allow for a post method to create a guest user
Re-Add routes
Re-Add layout/header & render header

Disassociate game from user
Call name method on @user
Re-Add Bcrypt
Change @game variable to @user variable to get name of user
Remove references from games table

-Removing association between games and user
-Game does not belong to a user anymore
-Remove user_id from games table
Add column user_id to games
Add guest column to users table
ReAdd Password_digest column to users

Modify add guest to users migration
	-Change guests column to guest