Add terminus_mini keyboard and nyquist/DivergeJM layout (#1851)

* First commit of the Terminus_Mini firmware and the DivergeJM version of the Nyquist firmware

* Fix terminus_mini & nyquist/DivergeJM readme files

Previously an outdated copy of the default readme. Updated to match the  Nyquist/DivergeJM format (DivergeJM is a split 5x12 implementation of the terminus_mini layout)

* Update makefiles to rules.mk

Renamed both Makefiles to rules.mk, removed references to makefiles

* Updated rules.mk

Inadvertantly removed important code from the rules.mk in previous commit. This has been restored.

Also disabled Tap_Dance in both rules.mk files

* Moved terminus_mini to handwired

Realised that existing directory was not appropriate for the terminus_mini project, moved to handwired.

keyboards/nyquist/keymaps/DivergeJM/config.h

@@ -0,0 +1,26 @@
+/*
+Copyright 2017 James Morgan <ja.morgan1@outlook.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/>.
+*/
+
+#define USE_SERIAL
+
+#define MASTER_LEFT
+// #define _MASTER_RIGHT
+// #define EE_HANDS
+
+#ifdef SUBPROJECT_rev1
+    #include "../../rev1/config.h"
+#endif