Use custom storage instead of django-compressor

[davidbgk]

This is a really early stage.

• Deal with the commented favicon.ico which tries to reach staticfiles_storage.url("umap/favicons/favicon.ico")
• Check that all paths are well rewritten
• Handle dynamic {locale}.js path, not sure how it can work, maybe with intermediary variable?
• Fix tests :)

The support_js_module_import_aggregation toggle + wrong regexps for our prettier semicolons-less config were hard to find!

[yohanboniface]

Deal with the commented favicon.ico which tries to reach staticfiles_storage.url("umap/favicons/favicon.ico")

I'm missing the issue here: it seems to work well locally, either with DEBUG=True or False and using an nginx proxy, the path to favicon.ico seems to be updated in the served HTML, I see that even favicon.ico exists in the static dir, so even if some browser wants that path explicitly it will find it. So I guess I'm missing the point ;)

[davidbgk]

So I guess I'm missing the point ;)

Well, in a previous attempt it was an issue during the collectstatic command, maybe another setting was wrong because now it works for me too!

[davidbgk]

now it works for me too!

Not so fast, tests are failing because of that.