Remove all Makefiles from the keyboards directory. (#1660)

* Remove all Makefiles from the keyboards directory.

* update keymaps added in the last 8 days

* Ignore keyboard/keymap makefiles

* update hand_wire to reflect our new Makefile-less reality

* Update the make guide to reflect the new reality

* move planck keymap options to rules.mk

* update planck keymaps 4real

* trigger travis

* add back build_keyboard.mk

* restore changes to build_keyboard

keyboards/xd75/keymaps/default/rules.mk

@@ -0,0 +1,18 @@
+# Copyright 2013 Jun Wako <wakojun@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 QUANTUM_DIR
+	include ../../../../Makefile
+endif