Merge pull request #788 from dadav/fix/preview_toml_adjustment

Adjust preview.py (toml)

scripts/preview.py

@@ -3,6 +3,7 @@ import sys
 import os
 import argparse
 import yaml
+import toml
 
 sys.path.insert(0,
                 os.path.join(os.path.dirname(os.path.realpath(__file__)),