Added reference to MODIFYING in README

Will have to write MODIFYING

groundStation/README.md

@@ -20,3 +20,6 @@ If you wish to change the way the backend communicates to the quad and vice vers
 	This provides a list of environment variables which you can set and use for your computer or time of use.
 	Because the backend must be ran with sudo privledges, you will need to preserve the env. vars. with sudo rights.
 	Hence the "-E" flag.
+
+## Modifying
+See MODIFYING for the software architecture/organization and how to add new functionality.