Description

Enable the display of the update's description. It uses bootstraps modal window, so can be closed by clicking outside of the window, clocking the close buttons or hitting escape.

To enable the display of the description information, two additional python modules were needed, the first is [BeautifulSoup](http://www.crummy.com/software/BeautifulSoup/), and the second is the [lxml](http://lxml.de/) parser (used in conjunction with BeautifulSoup). 

An example of how a description is displayed is as follows:-
![description](https://f.cloud.github.com/assets/2062699/240723/18b2d07c-8943-11e2-9f28-f673eb3a98a6.png)

I've also added the update ID as a tool tip, and appended it to the description. This should assist people using the newer builds of Munki with Reposado and Margarita when applying pkginfos to Apple Updates.