Fix getPicon to return correct picon for streams

getPicon doen't like url part of service reference, so remove it.
Also service reference can be quoted, unquote.

Without patch:

![without_picon_current](https://f.cloud.github.com/assets/2682247/1749976/850eb932-655e-11e3-8b17-a8b1fcc777c5.png)

![without_picon_epg](https://f.cloud.github.com/assets/2682247/1749977/8513e3bc-655e-11e3-8376-8ba471414abf.png)

With patch:

![with_picon_current](https://f.cloud.github.com/assets/2682247/1749978/85184b8c-655e-11e3-88c7-b29dc6c10d52.png)

![with_picon_epg](https://f.cloud.github.com/assets/2682247/1749975/84da0a16-655e-11e3-9aba-58674414ccf2.png)