[Keyboard] Rebound keyboard add (#7886)

* create Rebound keyboard

* proofread

* update decade

* layer enums

* revert enum layer changes

* line spacing and such

* product ID and punctuation

* terminating terminating slashes

* layer enums

* remove slashes

* rules change, rgb and spacing

* plural layouts rgb rulez

keyboards/montsinger/rebound/rebound.h

@@ -0,0 +1,39 @@
+/* Copyright 2020 Ross Montsinger
+ *
+ * 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/>.
+ */
+
+#pragma once 
+
+#include "quantum.h"
+
+/* This is a shortcut to help you visually see your layout.
+ * The first section contains all of the arguments representing the 
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+ 
+#define LAYOUT_ortho_4x12( \
+    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B,\
+    K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B\
+    ) { \
+  { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+  { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+  { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+  { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B } \
+}