Update 'README.md'

README.md

@@ -1,5 +1,9 @@
 # rpi_cnc_header
-
+# Intro
 There are not many accessible, or simple enough solutions to use for interfacing a raspberry with the BoB (break out board) for simple CNC machining. 
 The Breakout Board being extremely cheap (but Chinsesium) 
 
+# References
+# [RPI CNC Documentation](https://wiki.kynsight.com/en/home/projects/LinuxCnc/rpi_cnc_header) 
+# [Linux CNC Intro](https://wiki.kynsight.com/en/home/projects/LinuxCnc) from kynsight wiki
+#