Bugfixes:
* "Clear Paths" change from last commit wasn't complete yet. Now it REALLY only clears the paths of the selected bones
* Button layout in "Armature Visualisation" panel has been reorganised a bit to better present the options (clearer separation between Display and Calculation buttons)
New Stuff (Yay!):
* Paths of active bones now draw more visibly than those of unselected bones. This makes it easier to identify the path that is taken by the bone
* The part of path on the current frame is now drawn in green (the same shade that is used for the current-frame line in the Animation Editors). This nicely blends between the black and blue parts of the path (before and after current frame, respectively), and looks much nicer.
* The colour of the current-frame marker in the Animation Editors and the 3D-View, are now theme-colours. This is needed to make the previous option work.