add check for reading ascii fbx files, was common annoyance that users are unaware that they try to import ascii files.


git-svn-id: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons@4751 96b784f8-4ae3-dd11-aff7-0030488c597c
fix [#36714] FBX Importer fails to import binary FBX out of 3DS MAX


git-svn-id: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons@4752 96b784f8-4ae3-dd11-aff7-0030488c597c
OBJ export: export split normals when "Include Normals" is checked (help keep sharp edges...).

git-svn-id: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons@4753 96b784f8-4ae3-dd11-aff7-0030488c597c