Fix AutoDJ start
Merge branch 'master' of git://github.com/mixxxdj/mixxx into variables_svg
Fix interpretation of "xFaderReverse" to  "> 0"
Made xFaderMode and xFaderReverse Toggle buttons.
Merge branch 'master' of git://github.com/mixxxdj/mixxx into variables_svg
Replace some ControlObjectThreads with ControlObjectSlaves
Merge branch 'master' of git://github.com/mixxxdj/mixxx into variables_svg
cleaning useless overload