Add mouse support to ADB

Adding the makefile options ADB_MOUSE_ENABLE and ADB_MOUSE_ACCMAX.
Might have gone overboard with comments, and tried but failed at not
adding more than necessary outside the converter/adb_usb/ folder.

tmk_core/common/keyboard.c

@@ -39,6 +39,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef SERIAL_MOUSE_ENABLE
 #include "serial_mouse.h"
 #endif
+#ifdef ADB_MOUSE_ENABLE
+#include "adb.h"
+#endif
 
 
 #ifdef MATRIX_HAS_GHOST
@@ -69,6 +72,9 @@ void keyboard_init(void)
 #ifdef SERIAL_MOUSE_ENABLE
     serial_mouse_init();
 #endif
+#ifdef ADB_MOUSE_ENABLE
+    adb_mouse_init();
+#endif
 
 
 #ifdef BOOTMAGIC_ENABLE
@@ -147,6 +153,10 @@ MATRIX_LOOP_END:
         serial_mouse_task();
 #endif
 
+#ifdef ADB_MOUSE_ENABLE
+        adb_mouse_task();
+#endif
+
     // update LED
     if (led_status != host_keyboard_leds()) {
         led_status = host_keyboard_leds();