add pep8 headers so these scripts spit out errors when running pep8.

made some changes but mostly these scripts will give pep8 warnings.

release/scripts/io/engine_render_pov.py

@@ -16,6 +16,8 @@
 #
 # ##### END GPL LICENSE BLOCK #####
 
+# <pep8 compliant>
+
 import bpy
 
 from math import atan, pi, degrees