Updated 'README.md' with what files are hardware-contolling.

Author: brucestull

README.md

@@ -2,3 +2,15 @@
 
 - Repository for Raspberry Pi Clock code.
 - Original code created May of 2016.
+
+## Hardware-Control Modules (Modules which interface with `RPi.GPIO`)
+
+- `Draw.py`
+- `Digits.py`
+- `Segment74Clear.py`
+- `Segments.py`
+
+## Automated-Testing-Capaable Modules
+
+- `Multiplex.py`
+- `DisplayTime.py`