refactored HAL library

builds two libraries, Athena  and Desktop.
Simulation should use Desktop, Robots should use Athena

Also:
 - copied Driverstation and Joystick from Devices into Sim
 - Descreased dependency of pthreads in JNI.
 - removed Simulation ifdef from non simulation
 - added missing decprecated attribute for msvc
 - removed usage reporting from sim
 - removed unused pom.xml and constexpr

Change-Id: If8eb540f9434dce17c77a245fda6985713e80b2d

wpilibc/wpilibC++Sim/src/IterativeRobot.cpp

@@ -164,7 +164,7 @@ void IterativeRobot::StartCompetition()
 			}
 		}
 		// wait for driver station data so the loop doesn't hog the CPU
-		m_ds->WaitForData();
+		m_ds.WaitForData();
 	}
 }