Support ASX stream descriptions

Format is:
```
<asx version="3.0">
<banner href="[url to banner gfx]">
<moreinfo href="[url to homepage]" />
<abstract>Station Site</abstract>
</banner>
<entry>
<title>[stream name]</title>
<ref href="[actual steam url]" />
</entry>
</asx>
```
with the TITLE and REF tag being the interesting part