C++ refactoring, plus low-power support, plus software-based SPI CS

I'm backlogged.

lib/fonts/font-notomono-64.h

@@ -0,0 +1,15 @@
+/* AUTOMATICALLY GENERATED FILE! EDITING NOT RECOMMENDED!
+ *
+ * This file is distributed under the terms of the MIT License.
+ * See the LICENSE file at the top of this tree, or if it is missing a copy can
+ * be found at http://opensource.org/licenses/MIT
+ */
+
+#ifndef _FONTEM_notomono_64_H
+#define _FONTEM_notomono_64_H
+
+#include "fontem.h"
+
+extern const struct font font_notomono_64;
+
+#endif /* _FONTEM_notomono_64_H */