Refactor the findUsers code to be less ******* stateful #34
Description
Right now we initiate an invitation by first initialising all the variables required to make a game and storing them in some globals. When an invitation is received we store the inited variables (from the invite message) in the same globals. If a game is accepted then these globals are read by both users and a game is started.
This is stupid.
We should simply make an invitation. If the invitation is accepted then the inviter will init some global variables and send them in a gegin-game message. When the accepting user receives the begin-game message it simply begins the game. This removes all the horrible globals and their management.
One issue that may come up with a refactoring like this is that we will get a number of race conditions (mostly with the accepting user). Therefore the turnQ variable may have to stay. We'll see.