Blender Git Loki

More armature stuff;

- The "Skinnable" option for Bones now is taken into account for the
Envelope drawmode. If not Skinnable, it also doesn't draw the soft
deform area. Maybe bone should be hidden... dunno yet.
- Use CTRL+LMB in weightpaint mode to sample the weight in a mesh.
Note; it returns the weight of the closest visible vertex, not of a
Blended result.
- NKey Panel for Mesh edit now shows a menu with the VertexGroup name(s)
of a selected Vertex, plus the Weight.

Fix:
- while scaling Bone points in editmode (Envelope drawtype), the Bone
root scale was not copied from (or to) the parent tip. This was not
visible (is not drawn) but deform did use it... causing weird errors.
For those who saw this error today: just go into editmode, select all
Bones, press Skey, enter. That fixes it :)