Add environment variable for Skald directory

Signed-off-by: parhamfh <parhamfh@kth.se>
Added a JSON template for generating a sample.pk.

Added to new assets/ folder

Signed-off-by: parhamfh <parhamfh@kth.se>
Added the csveditor.py module to scripts, since it is not soley for testing

but also generating that crucial JSON template

Signed-off-by: parhamfh <parhamfh@kth.se>
Added class for enabling modules to fetch their assets

Signed-off-by: parhamfh <parhamfh@kth.se>
WIP: Generating sample.pk from template and user choices.

Signed-off-by: parhamfh <parhamfh@kth.se>