Added meaningful README content

README.md

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-Hello World!
+QueryLang - A Parser for a Querying Language in PHP
+===================================================
+
+This is an example parser written for the "Let's build a Parser!" talk at the Dutch PHP Conference of 2012.
+
+Over several versions a Parser for a simplistic Querying language is built up using both predictive recursive descent
+and PHP-PEG.
+
+To install this projects dependencies you must use PHP5.3+ and Composer, please follow these instructions:
+https://github.com/composer/composer#installation--usage
+
+To run the test suite you must have PHPUnit installed,
+after which you can simply run the phpunit command in the project root.