[ardour-dev] CVS commit

[gerard van dongen]

* small fix in bbt calculations to get better results when snapping to  
beat subdivisions when frames_per_beat_subdivision is not an integer


* simplified constrained dragging:
   dragging a control point with button two will limit the movement to
	-strictly vertical if the drag movement is bigger in the y-direction,
       -strictly horizontal if the drag movement is bigger in the  
x-direction

There is no longer a special modifier key for vertically restrained  
dragging.

gtk_ardour 0.576.0
libardour 0.875.2