[TextureAtlas] fixes2.

git-svn-id: https://svn.blender.org/svnroot/bf-extensions/contrib@4564 96b784f8-4ae3-dd11-aff7-0030488c597c
[TextureAtlas] refactoring according to IdeasMan42 review.

git-svn-id: https://svn.blender.org/svnroot/bf-extensions/contrib@4565 96b784f8-4ae3-dd11-aff7-0030488c597c
minor edits to atlas script


git-svn-id: https://svn.blender.org/svnroot/bf-extensions/contrib@4566 96b784f8-4ae3-dd11-aff7-0030488c597c
Edit Linked Library Addon:
Fix: Add poll to check for active object and if its a dupligroup



git-svn-id: https://svn.blender.org/svnroot/bf-extensions/contrib@4567 96b784f8-4ae3-dd11-aff7-0030488c597c