Move ratelimit implementation into external crate 'henry'

Merge branch 'ratelimit' into master

Initial work on ratelimiting

Add initial support for media uploads

Bump version to 0.7.0-pre

Add password & email_address to user edit fields

Merge branch 'forgot-password' into master

Initial work on Forgot Password

Initialize SMTP transport

Add email_address to person table and signup API

Bump version to 0.6.0-pre

Merge branch 'tests'

Initial work on tests

Update to alpha version of activitystreams

Bump version to 0.5.0-pre

Implement translation using Fluent

Bump version to 0.4.0-pre

Bump version to 0.3.1

Bump version to 0.3.0

Bump version to 0.3.0-pre

Support markdown for post content