introduces setInner function
Introduced setAndConfirm function
emit valueChangeRequest if connected
Use new request signal for CO "Play"
minor style change
Filter effect
Coding style fixes
Yet another style fixes
TODO about sample rate bug in filter effect
allow copy version string by mouse and keyboard
Merge pull request #59 from daschuer/master

allow copy version string by mouse and keyboard
Fixed tainted flag in revision number
additional docu and fixes from review
fixed widget toggle state
fixed CO "play" meaning to "play command accepted". This makes a
differnce only during loading a track. Now "play" becomes always 1 when
a track command is received while loading.
removed debug output
fixed access to a NULL Track in PlayerInfo, fixes Bug #1210289
Style fixes
Add defalut old_depth to EngineFilterEffect construct, delete push button and knob in destructor
Fixing of default value in EngineFilterEffect's constructor