Added Arora

Arora is a lightweight cross-platform web browser. It's free (as in
free speech and free beer). Arora runs on Linux, embedded Linux,
FreeBSD, Mac OS X, Windows, Haiku, and any other platforms supported by
the Qt toolkit.

Arora uses the QtWebKit port of the fully standards-compliant WebKit
layout engine. It features fast rendering, powerful JavaScript engine
and supports Netscape plugins.