Create a new game from a QBJ registration file

You need to make a QBJ registration file before using this. Currently the only place to make these files is here, although if there's enough demand I can do a nicer UI within MODAQ.

1. Click on "+ New game" in the menu at the top of the page. The New Game dialog should pop up.
2. Select the From QBJ Registration pivot at the top of the dialog.
3. Click "Load Roster..." and select the roster file.
4. Once the rosters are loaded, pick the two teams you want to read for.
   • When you pick a team, you can choose which players are starting through the "Starter" checkbox.
5. Click on the "Choose file" button to load a packet
   • Packets must be either a Microsoft Word document (*.docx) or a JSON file (*.json).
     • Word documents are sent to a parsing service. If the service is unable to read the file, an error message will appear. If it couldn't parse the file, it will explain why and tell the user where in the packet the issue is.
     • JSON files should come from parsing a Microsoft Word document with Yet Another Packet Parser.
6. Click Start. If there are issues with the game (same teams chosen), the dialog will not close.