mixer simple basic abstraction - added python binding

reasons:
- rapid development
- class-like code structure
- more readable code
features:
- hcontrol binding is managed from python (opportunity to create
  virtual mixer without driver or join multiple cards to behave as one)

src/conf/smixer.conf

@@ -1,3 +1,4 @@
+_full smixer-python.so
 usb {
 	searchl "USB"
 	lib smixer-usb.so