Define a standard for slugs

[dag7dev]

As of now, I've decided for pouet importer to

• convert everything to lowercase: duped entries will be "just" limited to different spelling
• convert all special characters to unicode characters è --> e
• all special characters are replaced with -
• all spaces " " are replaced with -
• no duplicate hyphen characters are repeated (for example midnight---cavalier would be midnight-cavalier)

I've found that many entries as of today are placed in the "main" folder with mixed case notation, so "Midnight-Cavalier" would be different from "Midnight-Cavalier", resulting in a duped entry.

So I propose to include the rules I've written above in guidelines for contributing, in this way we can limit duped entries!

[avivace]

Makes sense! We can also suggest a "slugify" tool so this process becomes automatic, no?

[dag7dev]

While working on some importers (see pouet's PR for more details), I have defined a py_common module and a utils.py library. That file, contains a function that makes a proper slug starting from a generic text. I dont know if it's needed in JS, but if we're planning to make more scripts in Python, I think we can use that.

[avivace]

I agrre, a common utils class works and such method could keep the old scrapers "functioning"