Move source code into source subfolder

source/game/README.md

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+Game Design
+=================
+
+The game takes place in a series of simultaneous turns on an arbitrarily sized 2D board.
+
+Each player is in control of a set number of starting units, each turn receives data on the status of the board.
+
+Each player must then issue a single command to each unit in their control.
+
+The engine then takes all commands, evaluates all movement first simultaneously, then all other commands.
+
+All attempted movement to the same square by two or more units will fail.
+
+Friendly fire is enabled by default
+
+--------------------------------------------------------
+
+Units
+-----
+
+Currently only one unit, this will be expanded in the future.
+
+Units have a set of properties, and commands than can be issued.
+
+All units take one hit to kill.
+
+##### properties
+See [the unit header](unit.h) for full details on unit properties
+
+##### orders
+Commands take the form of a single char literal.
+See [the order header](order.h) for details on the orders