Adds two new features to collect and show useful analytics.
Usage Statistics:
* Begin tracking daily active users who log in and interact with major features
of the website each day, such as the chat room, forum and gallery.
Demographics page:
* For marketing, the home page now shows live statistics about the breakdown of
content (explicit vs. non-explicit) on the site, and the /insights page gives
a lot more data in detail.
* Show the percent split in photo gallery content and how many users opt-in or
share explicit content on the site.
* Show high-level demographics of the members (by age range, gender, orientation)
Misc cleanup:
* Rearrange model list in data export to match the auto-create statements.
* In data exports, include the forum_memberships, push_notifications and
usage_statistics tables.
* Forums are disowned on user account deletion (their owner_id=0)
* A forum without an owner shows a notice at the bottom with a link to petition
to adopt the forum. It goes to the Contact form with a special subject.
* Note: there is no easy way to re-assign ownership yet other than a direct
database query.
* Code cleanup
* Alphabetize the DB.AutoMigrate tables.
* Delete more things on user deletion: forum_memberships, admin_group_users
* Vacuum worker to clean up orphaned polls after the threads are removed
* Add a "Report" link to the footer of forums.
* Allow some non-admin users to view a private forum and its threads.
* Moderators and approved followers can see it
* Note: the endpoint to follow a forum won't let a user invite themselves
to a private forum. Currently there is no way to approve a user except
by also adding them as a moderator.
* Explore and Newest tabs can show these private forums if viewable.
* Add support for Web Push Notifications when users receive a new Message or
Friend Request on the main website.
* Users opt in or out of this on their Notification Settings. They can also
individually opt out of Message and Friend Request push notifications.
Finish implementing the basic forum features:
* Pinned threads (admin or board owner only)
* Edit Thread settings when you edit the top-most comment.
* NoReply threads remove all the reply buttons.
* Explicit forums and threads are filtered out unless opted-in (admins
always see them).
* Count the unique members who participated in each forum.
* Get the most recently updated thread to show on forum list page.
* Contact/Report page: handle receiving a comment ID to report on.
Implement Likes & Notifications
* Like buttons added to Photos and Profile Pages. Implemented via simple
vanilla JS (likes.js) to make ajax requests to back-end to like/unlike.
* Notifications: for your photo or profile being liked. If you unlike,
the existing notifications about the like are revoked.
* The notifications appear as an alert number in the nav bar and are read
on the User Dashboard. Click to mark a notification as "read" or click
the "mark all as read" button.
Update DeleteUser to scrub likes, notifications, threads, and comments.
* Add the Contact page where users can contact the site admins for feedback or
to report a problematic user, photo or message.
* Reports go into the admin Feedback table.
* Admin nav bar indicates number of unread feedbacks.
* Add "Report" button to profile pages, photo cards, and the top of Direct
Message threads.
Misc changes:
* Send emails out asynchronously for more responsive page loads.
