Added link to retropilot column steering

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "actuators/steering/retropilot-drivetronik"]
 	path = actuators/steering/retropilot-drivetronik
 	url = git@github.com:wocsor/retropilot-drivetronik.git
+[submodule "actuators/steering/retropilot-column-steering"]
+	path = actuators/steering/retropilot-column-steering
+	url = https://github.com/R3D347HR4Y/retropilot-column-steering

actuators/steering/README.md

@@ -1,4 +1,4 @@
-# Steering Acutator
+# Steering Actuator
 General documentation for development surrounding the steering actuator
 
 ## Requirements
@@ -113,3 +113,10 @@ Go Home Specification
 - Contributors: amzoo
 - Status: WIP
 - Link: 
+
+### retropilot-column-steering
+
+- Contributors: R3D
+- Status: WIP, untested
+- Goal: Control steering from the column using a belt-pulley system
+- [Link to Files](https://github.com/R3D347HR4Y/retropilot-column-steering)