Use git submodule for grabberconfig

[bilelmoussaoui]

Instead of copying the updates done by the guys at five-filters, it's better to use a git submodule
@jscurtu is there any modification that should be done on the flatpak package?

[jangernert]

Is it possible to apply patches to the submodule?
We still carry a patched config for phoronix to remove double <div class='content'>

[bilelmoussaoui]

The patches should be applied to five-filters repository instead. Only if we wish to keep maintaining that huge database by ourselves...

[jangernert]

The changes were removed from filefilters. So I don't think it's something they'll merge.
Alternatively we have to rename the content-class in article.html and style.css to feedreader_content or something

[bilelmoussaoui]

Yeah, i will make sure of that before we merge #479

[bilelmoussaoui]

We can add a prefix for each class/id like FeedReaderArticleView to be sure that we won't mess with any other content