first pass at documenting codesniffer commands

CONTRIBUTING.md

@@ -1 +1,22 @@
 By contributing to this project, you agree to irrevocably release your contributions under the same licenses as this project. See README.md for more details.
+
+
+
+Coding Standards
+-----
+
+PHP CodeSniffer is used to normalize all code in this project.
+Please install it with
+```bash
+pear install PHP_CodeSniffer
+```
+
+You can then test your code with
+```bash
+phpcs --standard=ruleset.xml *.php
+```
+Or you can have it autofix whatever it can with
+```bash
+phpcbf --standard=ruleset.xml *.php
+```
+