add length average option to 'Follow Active Quads' unwrap, gives nicer results.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@53550 954f8c5b-7b00-dc11-b283-0030488c597c
commit bpy_path files, missed these in recent commit.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@53551 954f8c5b-7b00-dc11-b283-0030488c597c