To market, to market

bool doesMarketExist = true;
bool doesMarketWork = false;

I'm currently in the process of implementing the market, but due to my sloppy code I can't figure out the math for the costs and stuff (For instance, you get 21 coins for 2 apples, but only 11 for 4).  Once I get that all sorted out the game will actually be PLAYABLE!

Meanwhile, the item system is up and running.  I will make it so plants generally give you more than one seed (which as of right now is also the product.  I may change that in the future), but die when harvested.

The costs in the picture are more accurate, as I thought of a fix while writing this.