Merge pull request #44 from chartjes/gh-pages

Adding section on testing tools

_includes/testing.md

@@ -0,0 +1,13 @@
+# Testing
+
+Writing automated tests for your PHP code is considered a best practice and can lead to well-built
+applications. Automated tests are a great tool for making sure your application
+does not break when you are making changes or adding new functionality.
+
+Some common tools are:
+
+* [PHPUnit](http://phpunit.de)
+* [Behat](http://behat.org)
+* [Selenium](http://seleniumhq.org/)
+
+[Back to Top](#top){.top}