[configure] make waveform and spectrum visualizations optional
[make] don't install addon data of disabled addons
ActiveAE: flush engine on pause stream if only a single stream is playing
fixed, validate extradata before dereferencing it
Merge pull request #3148 from FernetMenta/aepause

ActiveAE: flush engine on pause stream if only a single stream is playin...
fixed: signed/unsigned comparision warning in ActiveAEResample.cpp
Merge pull request #3140 from wsnipex/binary-addons

Make waveform and spectrum visualizations optional and stop installing unwanted stuff
[osx] fix - include all subfolders in pvr addons
paplayer/DVDPlayerCodec: cosmetics - remove double-semicolons