readme.md in ffi-clang-0.8.0 vs readme.md in ffi-clang-0.9.0

@@ -37,10 +37,20 @@
 
     LLVM_CONFIG=llvm-config-mp-3.4 rake
 
 ## Contributing
 
-1.  Fork it
-2.  Create your feature branch (`git checkout -b my-new-feature`)
-3.  Commit your changes (`git commit -am 'Add some feature'`)
-4.  Push to the branch (`git push origin my-new-feature`)
-5.  Create new Pull Request
+We welcome contributions to this project.
+
+1.  Fork it.
+2.  Create your feature branch (`git checkout -b my-new-feature`).
+3.  Commit your changes (`git commit -am 'Add some feature'`).
+4.  Push to the branch (`git push origin my-new-feature`).
+5.  Create new Pull Request.
+
+### Developer Certificate of Origin
+
+This project uses the [Developer Certificate of Origin](https://developercertificate.org/). All contributors to this project must agree to this document to have their contributions accepted.
+
+### Contributor Covenant
+
+This project is governed by the [Contributor Covenant](https://www.contributor-covenant.org/). All contributors and participants agree to abide by its terms.