adding some basic exchange

main.py

@@ -0,0 +1,13 @@
+from lightmatchingengine.lightmatchingengine import LightMatchingEngine,Side,Trade,Order
+from econ.exchange import Exchange
+
+cx=Exchange()
+cx.add_to_account(0,"balance",1500)
+cx.add_to_account(1,"food",50)
+cx.add_to_account(2,"food",50)
+
+order_1=cx.submit_order(1,"food",50,2,side=Side.SELL)
+order_2=cx.submit_order(2,"food",50,1,side=Side.SELL)
+order_3=cx.submit_order(0,"food",100,2,Side.BUY)
+
+print("help")