Add support for the JJ40 Keyboard (#1834)

* Add support for JJ40

* Update readme

* Update maintaner

keyboards/jj40/jj40.h

@@ -0,0 +1,39 @@
+/*
+Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef KEYMAP_COMMON_H
+#define KEYMAP_COMMON_H
+
+#include "quantum_keycodes.h"
+#include "keycode.h"
+#include "action.h"
+
+#define KEYMAP( \
+    K01, K02, K03, K04, K05, K06, K07, K08, K09, K010, K011, K012, \
+    K11, K12, K13, K14, K15, K16, K17, K18, K19, K110, K111, K112, \
+    K21, K22, K23, K24, K25, K26, K27, K28, K29, K210, K211, K212, \
+    K31, K32, K33, K34, K35,    K3X,   K38, K39, K310, K311, K312  \
+) \
+{ \
+  { K012, K011, K010, K09, K05, K06, K07,   K08, K04, K03, K02, K01 }, \
+  { K112, K111, K110, K19, K15, K16, K17,   K18, K14, K13, K12, K11 }, \
+  { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \
+  { K212, K211, K210, K29, K25, K26, K27,   K28, K24, K23, K22, K21 }, \
+  { K312, K311, K310, K39, K35, K3X, KC_NO, K38, K34, K33, K32, K31 }  \
+}
+
+#endif