Support Patreon public posts

[StormPooper]

I was hoping to be able to create a feed for public Patreon posts, like at https://www.patreon.com/nextlander/posts?filters[is_public]=true. Unfortunately, when I add the feed, it actually scrapes the membership tiers on the Membership tab as posts, rather than the actual posts.

[jeromechoo]

It looks like Patreon makes it difficult for bots to read the posts since they're dynamically loaded in and not always in the same order.

I made some adjustments in the extraction model (off github) so it's actually loading posts now not membership tiers but the data is noisy. Will keep hammering at it.