Update and rename README to README.md

modules/README.md

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+HelmaLib is organized into several groups of modules:
+
+* **modules/core** which contains extensions to core JavaScript types such as
+Object, Array, or Date.
+* **modules/helma** which provide new functionality to JavaScript, usually by
+wrapping a Java library.
+* **modules/jala**, a Git submodule providing the very useful ORF.at libraries for Helma
+
+To use a HelmaLib module in your Helma application, you need to add it to the
+app's repositories. The simplest way to do so is by using the `app.addRepository()`
+function:
+
+    app.addRepository('modules/helma/Search.js');
+
+If you are looking for more Helma libraries, be sure to check out the 
+<a href="https://opensvn.csie.org/traccgi/jala/wiki">Jala project</a>!