CC-1469:
Crossfading support (non-equal power)

-initial commit
CC-1469: Crossfading support (non-equal power)

-further implementation..
CC-1469: Crossfading support (non-equal power)

-further implementation..
CC-1469: Crossfading support (non-equal power)

-webstreams scheduled in the future are now working...
CC-1469: Crossfading support (non-equal power)

-cleanup
CC-1469: Crossfading support (non-equal power)

-refactor
CC-1469: Crossfading support (non-equal power)

-fix few bugs
Merge branch 'cc-1469-crossfade' into devel

Conflicts:
	python_apps/pypo/pypopush.py