Moves HAL cpp headers from root to HAL directory (#174)

Could not include the ctre and NetComm folders, as those would require
changing ctre dependancies. Also removes a duplicated FRCComm header
that was not needed.

wpilibj/src/athena/cpp/lib/CompressorJNI.cpp

@@ -7,7 +7,7 @@
 
 #include "HAL/HAL.h"
 #include "HALUtil.h"
-#include "Log.h"
+#include "HAL/cpp/Log.h"
 #include "edu_wpi_first_wpilibj_hal_CompressorJNI.h"
 
 extern "C" {