Provide a Contributor License Agreement #584 (updated naming)

#584

Change-Id: I9e84f13067d14f0ba512bc22549050ebb05f0d16
Signed-off-by: Mike Rennie <[email protected]>

Author: mrennie

CONTRIBUTING.md

@@ -2,6 +2,18 @@
 
 Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.
 
+# Contributor License Agreement
+
+A CLA is a document that specifies how a project is allowed to use your code. We've put a lot of work into creating a CLA that is simple, effective, and as clear as possible so that it doesn't disrupt contributions to CSS Lint.
+
+When you make a contribution to the CSS Lint project, you agree:
+
+* The code you wrote is your original work (you own the copyright) or you otherwise have the right to submit the work.
+* To grant the CSS Lint project a nonexclusive, irrevocable license to use your submitted code in any way.
+* You are capable of granting these rights for the contribution.
+
+By submitting a fix to CSS Lint you agree to the above statements.
+
 # Contributor Code of Conduct
 
 As contributors and maintainers of this project, and in the interest of