References to `vi` API version replaced with `v1`

* Allow users to update their Account in the API

It would be nice for API clients to be able to allow users to update
their accounts without having to wrap Mastodon in a web view. This patch
adds an API endpoint to let users submit a PATCH for their account.

Signed-off-by: David Celis <me@davidcel.is>

* Add /api/v1/accounts/update_credentials to the API docs

Signed-off-by: David Celis <me@davidcel.is>

* Adds task to confirm user by email.

* Adds documentation for manual confirmation.

Correct mastodon.brussels.fr to mastodon.brussels

Add ipv6 support

Update my URL since toot.zone was shut down.

I have created a bot that will post Hacker News stories with 100+ points. Adding it to the list.

the syntax for running the rake task wasn't correct.

Cleaning up the heroku admin command bit to match the form used in Administration-guide.md and clarify the wording a bit.

Removing some of the confusion around what format S3 bucket names and regions should be entered as well as providing an example of an S3 policy that follows best security practices for this sort of thing.

This is a Mastodon with a particular constraint about
what symbols you can post.

Under ## General dependencies:
apt-get needs sudo and install was typed wrongly.

Just launched https://hackertribe.io/, added it to the list.

Add mastodon.land instance