contributing examples

Contributing.md

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+# Contributing
+
+tl;dr make a pull request
+
+## Contributing Examples
+
+We can always use better examples.
+Contributing examples for a plugin can be done by creating a folder if one does not already exists in the `example/plugin` folder.
+
+First create your example go file `foldername.go` with your example code.
+
+Next create a Readme.md in the folder with the following content:
+
+````
+The <functionName> function ...
+
+```go
+
+```
+
+goderive will generate the following code:
+
+```go
+
+```
+
+````
+
+The go blocks will be populated with your example code and the generated code using the following command:
+
+```sh
+cd .. # goderive/example
+make
+```
+
+Finally go and add a link (if one does not already exist) in the top level Readme.md of the project.
+
+You are ready to submit a pull request.