Custom tables 2

[Vac1911]

Look I made it so you can change what columns tables have:

and you can reorder them with drag and drop easily

Since the previous pull request:

• I've improved the backwards compatibility so a ton of tables don't have to be updated. Currently I've only upgraded freeAgents, tradingBlock, trade, playerStats, playerRatings, and playerBios.
• Made the TableConfig Class unserializable so that it's methods can be used in the ui.
• Improved the API for adding dynamic columns (such as the include column on the trading block) and updating columns through new methods in TableConfig
• All other changes talked about in the previous pull request.