Bitcoin to Traditional Currency Conversion

Uses currency abbreviation triplets: 
* jpy, sek, usd, btc, 
* etc...per Mt Gox
Listed server updates every 15 minutes

### Use:

    1.0 usd to btc

    1.0 btc to usd


#### ToDo:
    Fix favicon
    Test if integer preceding trigger [ "usd to btc" or "btc to jpy"] gets blocked by other plugins
        Told in IRC this is fixed on the mainline