Update the brython function to only run scripts when not in a webworker.
Update the brython function to only run scripts when not in a webworker.

jonathanverner/brython,kikocorreoso/brython,Hasimir/brython,Hasimir/brython,jonathanverner/brython,jonathanverner/brython,brython-dev/brython,kikocorreoso/brython,brython-dev/brython,brython-dev/brython,Hasimir/brython,kikocorreoso/brython,jonathanverner/brython,Hasimir/brython