Make modules send their features (key count and whether they have pointer input) to the master upon enumeration.

left/src/module.h

@@ -0,0 +1,9 @@
+#ifndef __MODULE_H__
+#define __MODULE_H__
+
+// Macros:
+
+    #define LEFT_KEYBOARD_HALF_KEY_COUNT (5*7)
+    #define MODULE_HAS_POINTER false
+
+#endif