Fixes #791

Correctly respond to application/ld+json requests, part 2

Add index to improve post retrieval speed on large instances

Support resetting password via email

Closes T508

Plumbing: login via emailed link

Ref T731

Add Subscribers page

Closes T826

Support email subscriptions

Fix fonts not getting applied on first load

This finishes the work started in #766, ensuring that requests to
canonical URLs of blogs and posts (not just at their API endpoints)
respond correctly to `application/ld+json;...` requests.

Fully addresses issue #564

On an instance with millions of posts across all users, a single blog with
thousands of posts on it can take a long time to render. This adds an index
to the `posts` table to speed up the basic GetPosts query.

Run: `writefreely db migrate`

Closes #741

Add editorconfig

Spelling

This adds a self-serve password reset page. Users can enter their username
and receive an email with a link that will let them create a new password.
If they've never set a password, it will send them a one-time login link
(building on #776) that will then take them to their Account Settings page.
If they don't have an email associated with their account, they'll be
instructed to contact the admin, so they can manually reset the password.

Includes changes to the stylesheet and database, so run:

    make ui
    writefreely db migrate

Closes T508

This doesn't add any user-facing behavior, but provides the basic functionality
to generate a one-time use token and email it to a user, so they can log in with
a link instead of a password.

Ref T826

- Shows all fediverse followers and email subscribers
- Shows number of email subscribers on Stats page
- Links to Subscribers page from Stats page

Requires running `make ui` to regenerate stylesheet.

Ref T826

This reverts commit 059f0d4c54.

Bump github.com/writeas/web-core from 1.5.0 to 1.6.0

Previously, didn't auto-increment or populate

Instruct users to contact admin, not WF developers on 500 page

chore: slice replace loop

chore: unnecessary use of fmt.Sprintf

chore: remove refs to deprecated io/ioutil

Support filtering blog posts by language

Closes T805

Support rel=me verification on blogs

Misconfigured or broken servers has directed people to the wrong place.

Fixes #684