VRay CompTex Bump

This tool supports both vray2 and vray3 EdgeTex (new VRayEdgesTex in vray 3.3).
For vray2 you control only the Thickness with radius spinner in world unit.
For vray3 ei. 3.3 i've added most important options and few more:
- "New Comp On Empty Bump" chekbox
if you check this option and press "Create CompTex Bumps" button
all vr materials of selected objects which not have bump map will get
new VRayCompTex with VRayEdgeTex as SourceA (first slot). The second slot will remain blank.

- "Edit Existing Comps Mode" chekbox
if you check this option and press "Twick CompTex Bumps" button
you will edit all VRayCompTex Bump maps of selected objects with new parameters.

Script is requested by