#10 Add info variable for watermark

[Jorgo]

First of all thanks for making the DVD-A watermark detector a separate DSP component. My NVIDIA ION wouldn't have enough horsepower to decode MLP AND run the detector at the same time. That said, could you add real-time DVD-A feature reporting when watermark detection is enabled, with an info variable like "dvd_watermark" so I can have that info in the status bar, please? The HDCD component does something similar to report which HDCD features have been detected. Thanks for considering it!