fix [#34864] Save&Load - Relative Paths ticked, Obj Import and Textures tab uses absolute paths
use preference for relative paths.


git-svn-id: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons@4450 96b784f8-4ae3-dd11-aff7-0030488c597c
In Swap Shaders added ability to swap to 'Add Shader' and to 'Mix Shader' and few minor changes in naming of variables

git-svn-id: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons@4451 96b784f8-4ae3-dd11-aff7-0030488c597c