Create the project workspace directory using a slug-like name (at least without spaces)

[pombredanne]

We should consider to create the project workspace directory using a slug-like name (at least without spaces). This helps when iterating over the directories

[tdruez]

@pombredanne It appears that this is already the case https://github.com/nexB/scancode.io/blob/main/scanpipe/models.py#L464

The project workspace directory is generated from a slug of the project name plus a unique ID https://github.com/nexB/scancode.io/blob/main/scanpipe/models.py#L453

This may not work properly on your side though, could you provide an example of a directory that is not correct and what it should be instead?