AMJ40 Refactor (#11854)

* update keyboard source files

- add license headers (attributed to original keyboard submitter)
- #pragma once include guards
- file template matching
- readme update and template matching

* set sensible default keyboard settings

- enable Bootmagic Lite and Mouse Keys
- disable Console and Command
- remove default keymap's rules.mk file

* remove unnecessary files from default keymap

* refactor default keymap

* add additional layouts/keymaps

* update keyboard readme

- add images and bootloader instructions
- reformat link list

* convert tabs to spaces in default keymap

keyboards/amj40/amj40.c

@@ -1 +1,17 @@
+/* Copyright 2017 Fabian Topfstedt
+ *
+ * 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/>.
+ */
+
 #include "amj40.h"