Store the number of configured decks in the soundmanager config.
Make interface slightly more sane.
Only correct deck count for ins and outs that refer specifically to deck counts.
Fix out of date value
Merge branch 'master' into 4deck-init-take-2

Conflicts:
	src/soundmanager.cpp
	src/soundmanagerconfig.cpp
Merge pull request #141 from ywwg/4deck-init-take-2

Rework deck startup initialization so the number of decks is stored in soundmanager config