Update existing keymaps

Update existing keymaps to enable MIDI_BASIC functionality.  Also added
an option MIDI_ENABLE_STRICT to be strict about keycode use (which also
reduces memory footprint at runtime)

quantum/template/config.h

@@ -163,6 +163,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
  * MIDI options
  */
 
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
 /* enable basic MIDI features:
    - MIDI notes can be sent when in Music mode is on
 */