Added script dir to python path for multi file scripts

[4cardbot]

This change resolves #57 by adding the original script directory to the python path.

[4cardbot]

This does not make sure that any global variables defined in the imported files are added to the config and other changes like changing relative path to absolute etc.
I am not sure if anyone defines any global variables in an imported file. What do you think?

[4cardbot]

@AllenHW @tovacinni

1. Also what about the imported files? I think they need to be added to the temp directory created in the reports as well.
2. And to solve issues with paths, I believe the paths should be as relative paths in the script in the temp directory.