Previously, we'd sleep for 2 seconds and then return for no reason. This
fixes that.

This changes all variables and functions from using Suspend{ed} to using
Silence{d} as well as documentation, errors and logging.

- update error messages to be correct
- move suspended message into template and include for other pages
- check suspended status on all relevant pages and show message if
logged in user is suspended.
- fix possible nil pointer error
- remove changes to db schema files
- add version comment to migration
- add UserStatus type with UserActive and UserSuspended
- change database table to use status column instead of suspended
- update toggle suspended handler to be toggle status in prep for
possible future inclusion of further user statuses

(https://github.com/writeas/writefreely/pull/195)

intermediate page (WIP) that shows the user profile page url

be Note to work but I will open an issue for them and see what their
reaction will be.

Includes:

* AP Collection fetching via canonical URL
* AP Collection fetching via API
* AP Post fetching via canonical URL
* AP Post fetching via API

Ref T693

This renders all requests for that user's posts, collections and related
ActivityPub endpoints with 404 responses.

While suspended, users may not create or edit posts or collections.

User status is listed in the admin user page

Admin view of user details shows status and now has a button to activate
or suspend a user.

this changes handleFetchCollectionInbox to log _all_ errors after
attempting to insert an actor in the remoteusers table. previously
checking for all errors _except_ duplicate keys would cause a panic if
an actor made a request to follow while already having followed.

instead of linking to posts only on a user's blog.

Ref T681

This fixes places, especially around federation, where the Collection's
`hostName` wasn't set.

This moves `hostName` to the `Collection` struct, where it's needed. The
field is populated after successful `GetCollection...()` calls.

This isn't the cleanest way to do things, but it accomplishes the goal.
Eventually, we should accept the AppCfg to `GetCollection...()` calls,
or make them `App` methods, instead of `datastore` methods.

Ref T613

(instead of writing out the logic of that helper function)

Ref T613

this moves the unmarshaling of a remote actor out into a new helper which
accounts for the possibility of a context being a list or a single entity.
i.e. a string or an object.

basics tests are provided for both situations

also go fmt'd the file activitypub.go

this moves the unmarshaling of a remote actor out into a new helper which
accounts for the possibility of a context being a list or a single entity.
i.e. a string or an object.

basics tests are provided for both situations

also go fmt'd the file activitypub.go

Previously the query would fail with "no such function: NOW"

Closes #56

instead of the requesting user's. This closes #16

Prepend with hash, not hyphen

This closes #16

Part of #8

Part of #8