-Added .hdr format support

-Added default environment editor setting
-Added environment created by default in new projects
-Removed default light and ambient from spatial editor, to make the editor more PBR compliant

modules/hdr/config.py

@@ -0,0 +1,7 @@
+
+def can_build(platform):
+    return True
+
+
+def configure(env):
+    pass