Convolution filtering

[rompolompo]

@Luckygipi

1. Install and configure BubbleUPNP server (Pi or any old PC will work. I run Ubuntu Server on an old HP)
2. Create a convolution file based on your needs (DSP, Room Correction, etc...)
3. Create an Open Home instance that points to MiniDSP
4. Upload the convolution file to the BubbleUPnP server
5. Add the path to that file under the setting for the new Open Home created

Done!