- Major overhaul of the Simulator control class (where 'main' lives).

- Removed the CommandParser class entirely, as the weird dependency between
  Simulator and CommandParser never made me comfortable.
- Added a Command inner class to Simulator that handles some of the
  command line tokenizing.

src/test/java/com/loomcom/symon/CpuIndexedIndirectModeTest.java

@@ -1,7 +1,6 @@
 package com.loomcom.symon;
 
 import com.loomcom.symon.devices.Memory;
-import com.loomcom.symon.exceptions.MemoryAccessException;
 
 import org.junit.*;
 import static org.junit.Assert.*;