Mostly working user guild settings

Small fix for tag digit and undefined email

Allow empty content through block list

Primitive banned words blocking

Guild join messages

optional

add joined_by to allow for separate treatment of force-joiners

Revert "Make member.premium_since ISO8601 timestamp" (#710) ...

This reverts commit f1caebe.

Make member.premium_since ISO8601 timestamp

Change premium_since to bigint

Changing Member.premium_since back from Date to number fixes an error in the Discord electron client related to rendering premium status. (#669) ...

Client throws "Invalid time value", so I'm guessing it's something to do with premium_since not being the date format they want ( allegedly ISO8601, but works with a plain number, so wtf )

Fix for Premium Since to show the 'Guild Boost' and store it correctly in the database

User presence/status

fix prune

added route /guilds/:id/prune GET count and POST prune. ...

Edited Member entity to include last_message_id to avoid searching for every members last message when pruning
When a message is sent through /channels/:id/messages last_message_id of sending Member is updated.

generalize primary column to work with mongodb object id

fix .delete -> add onDelete: "CASCADE"

Merge branch 'master' of https://github.com/fosscord/fosscord-api

fix ready members payload

added ban check to `Member.addToGuild`

fix #311

fix member has no roles in guild create

fix client connection crash on guild create

fix #310

fix#310

update entities

fix entity missing an id (replace .insert with new Entity().save)

add user_id field to Member

fix entity types and projection

delete _ids from entities