updates to example service and documentation supporting it

docs/services.md

@@ -0,0 +1,13 @@
+# CORE Services
+
+* Table of Contents
+{:toc}
+
+## Custom Services
+
+CORE supports custom developed services by way of dynamically loading user created python files.
+Custom services should be placed within the path defined by **custom_services_dir** in the CORE
+configuration file. This path cannot end in **/services**.
+
+Here is an example service with documentation describing functionality:
+[Example Service](exampleservice.html)