Minor Tweaks and Documentation

Fixed compiler warning by including bootloader.h in keymap_common.c.

Changed FORCE_NKRO to only be applied if NKRO_ENABLE is defined.

Added extra documentation to the template config.h

quantum/keymap_common.c

@@ -25,6 +25,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "debug.h"
 #include "backlight.h"
 #include "keymap_midi.h"
+#include "bootloader.h"
 
 #include <stdio.h>
 #include <inttypes.h>