October 2011 Coding Challenge/New developer intro

General dev resouces

 * #mediawiki
 * wikitech-l
 * Manual:Coding conventions
 * Manual:Pre-commit checklist
 * Security for developers
 * How to become a MediaWiki hacker
 * Manual:PHP unit testing
 * Manual:JavaScript unit testing
 * TODO: Make sure we have an up-to-date browser matrix (anything not supported by jQuery, >x% )