MIQ (Patternfly) chart theme updates

eliminated grid border and shadow; set background to transparent
before:
![screen shot 2014-11-20 at 10 54 13 am](https://cloud.githubusercontent.com/assets/1287144/5127821/b457ec66-70a4-11e4-902e-30c8ffbf1c7b.png)

![screen shot 2014-11-20 at 10 54 42 am](https://cloud.githubusercontent.com/assets/1287144/5127820/b456c0e8-70a4-11e4-90da-253864232775.png)