I27 realtime lobby updating

[justinarat]

Implemented most of the functionality for the lobby view.

There are 2 more urgent tasks that depend on other branches/issues. Issues for the 2 tasks:

• 60

• 61

Changes:

• Joining/leaving the lobby
• Lobby chat
• Realtime lobby info updating (player count, player usernames)
• Server-side rendering of lobby
• Error if lobby is full, redirects user to the lobby searching page and flashes and error message

[justinarat]

Made some changes to the model classes due to conflicts:

• Remove tag groups and suggestions
• Rename LobbyId to LobbyID

[JohnGiampaolo]

In my review of the PR, all features seem to be working as expected. I first tested with one account, viewing a lobby page through http://127.0.0.1:5000/lobby?lobby_id=1014 (which links to a lobby ID). After clicking join, the player count went up, as expected. The chat feature also seems to be working well.

I then tested out with a second account through a private browser, and tried to join the lobby. That also worked as expected, and the chat feature worked delightfully well.

Here is a snapshot, note that "me" and "bob" are just two impromptu account names I made up to test this out.

I also tested with a third account to see what would occur with exceeding the lobby capacity. This was successful.

I then left the lobby from one of the accounts and joined from the third account and that worked too, so this implementation seems to be quite successful!