Preparing for Teensy 3 (ARM) integration, abstracting code hierarchy

- Abstracted USB Module
- Abstracted compiler specific includes for Scan, Macro, Debug, and USB modules
- Updated CMake build files to support changes
- Added abstractions necessary to main.c as well as a compiler specific include file

USB/pjrc/setup.cmake

@@ -1,6 +1,6 @@
 ###| CMake Kiibohd Controller USB Module |###
 #
-# Written by Jacob Alexander in 2011 for the Kiibohd Controller
+# Written by Jacob Alexander in 2011-2013 for the Kiibohd Controller
 #
 # Released into the Public Domain
 #
@@ -11,10 +11,27 @@
 # Module C files
 #
 
-set( USB_SRCS
-	usb_com.c
-	usb_keyboard_debug.c
-)
+
+#| AVR Compiler
+if ( ${COMPILER_FAMILY} MATCHES "avr" )
+
+	set( USB_SRCS
+		usb_com.c
+		avr/usb_keyboard_debug.c
+	)
+
+#| ARM Compiler
+elseif ( ${COMPILER_FAMILY} MATCHES "arm" )
+
+	set( USB_SRCS
+		usb_com.c
+		arm/usb_desc.c
+		arm/usb_dev.c
+		arm/usb_keyboard.c
+		arm/usb_mem.c
+	)
+
+endif ( ${COMPILER_FAMILY} MATCHES "avr" )
 
 
 ###