Add Contributing doc

CONTRIBUTING.md

@@ -0,0 +1,14 @@
+# Contributing to feqparse
+
+## Reporting Issues
+Issues, including bugs and feature requests, can be reported at https://github.com/FluidNumerics/feq-parse/issues
+
+## Contributing 
+If you want to help resolve [any open issues](https://github.com/FluidNumerics/feq-parse/issues), you can do the following :
+
+1. Fork this repository
+2. Insert your fixes and commit your changes to your fork. Be sure to include any new additional tests to demonstrate the new feature or bug fix.
+3. Open a pull request from your fork to this upstream repository.
+4. Work with the upstream reviewer to merge your changes into feq-parse.
+
+When you contribute code, feel add your name to the Contributors section of the README.md

README.md

@@ -3,6 +3,8 @@ Copyright 2020 Fluid Numerics LLC
 
 `feqparse` is an equation parser Fortran class that is used to interpret and evaluate functions provided as strings.
 
+[Learn how to contribute to this repository](./CONTRIBUTING.md)
+
 ## Installation
 
 For a quick installation to `/usr/local/feqparse`,
@@ -75,3 +77,7 @@ IMPLICIT NONE
 
 END PROGRAM FEqParseDemo
 ```
+
+## Contributors
+
+* (Maintainer) Joe Schoonover, Fluid Numerics LLC