Create CONTRIBUTING.md

Author: MikeRalphson

CONTRIBUTING.md

@@ -0,0 +1,13 @@
+# Contributing
+
+First of all, many thanks for considering making a contribution to this project.
+
+## Configs
+
+The main thing we need is config files which control the process of which files are processed by a particular set of templates. Testing
+the generated code is also extremely valuable.
+
+## New templates
+
+In the first instance, templates should be submitted to the parent [swagger-codegen](https://github.com/swagger-api/swagger-codegen) 
+project. If this is not possible, new templates can be added here first.