[UV Utility] new script "UVUtility" added to contribution repository.
[UVUtilities] fix for Campbell's suggestions
[UVUtility] other fixes of IdeasMan_42 suggestions
Merge remote-tracking branch 'hm-blender/master'

* hm-blender/master:
  [UVUtility] other fixes of IdeasMan_42 suggestions
  [UVUtilities] fix for Campbell's suggestions
  [UV Utility] new script "UVUtility" added to contribution repository.
whitespace cleanup
online_mat_lib update to new group API
also add support for nested groups
multiple instances of <?xml?> header to global var
multiple instances of many replace() for bad filename chars into function
material name saved as material attribute and used on re-creation
online_mat_lib fix frame nodes