Add OpenSIS 'modname' PHP Code Execution module for CVE-2013-1349

Add OpenSIS 'modname' PHP Code Execution module for CVE-2013-1349

* Homepage: http://www.opensis.com/
* Source:   http://sourceforge.net/p/opensis-ce/
* Tested:   OpenSIS versions 4.9 and 5.2 (Ubuntu Linux)

![opensis-exploit](https://f.cloud.github.com/assets/434827/1781269/76c9c4ae-6890-11e3-8e10-60d600bdc19d.png)