Porting of Craigs D-Link Smart Plug exploits to MSF

Craig Heffner has released some new exploits here:
http://www.devttys0.com/2014/05/hacking-the-dsp-w215-again-again/
http://www.devttys0.com/2014/05/hacking-the-d-link-dsp-w215-smart-plug/

Thx Craig!

Here are the Metasploit modules:

![dir_505_msf](https://cloud.githubusercontent.com/assets/497520/3301867/937c52b0-f62f-11e3-983b-b88f0e5227c3.png)


![dsp_w215_msf](https://cloud.githubusercontent.com/assets/497520/3301870/99a3ebc6-f62f-11e3-9781-383a048c25db.png)

I feel like the common ```'Ret'``` property should be used here. And let the ```# jump to system``` comment to clarify how control is being achieved. Also worths to comment where the ```jump to system``` comes from.