Adding doorkeeper, adding a REST API

POST /api/statuses                  Params: status (text contents), in_reply_to_id (optional)
GET  /api/statuses/:id
POST /api/statuses/:id/reblog

GET  /api/accounts/:id
GET  /api/accounts/:id/following
GET  /api/accounts/:id/followers
POST /api/accounts/:id/follow
POST /api/accounts/:id/unfollow

POST /api/follows                  Params: uri (e.g. user@domain)

OAuth authentication is currently disabled, but the API can be used with HTTP Auth.

db/migrate/20160306172223_create_doorkeeper_tables.rb

@@ -0,0 +1,50 @@
+class CreateDoorkeeperTables < ActiveRecord::Migration
+  def change
+    create_table :oauth_applications do |t|
+      t.string  :name,         null: false
+      t.string  :uid,          null: false
+      t.string  :secret,       null: false
+      t.text    :redirect_uri, null: false
+      t.string  :scopes,       null: false, default: ''
+      t.timestamps
+    end
+
+    add_index :oauth_applications, :uid, unique: true
+
+    create_table :oauth_access_grants do |t|
+      t.integer  :user_id,           null: false
+      t.integer  :application_id,    null: false
+      t.string   :token,             null: false
+      t.integer  :expires_in,        null: false
+      t.text     :redirect_uri,      null: false
+      t.datetime :created_at,        null: false
+      t.datetime :revoked_at
+      t.string   :scopes
+    end
+
+    add_index :oauth_access_grants, :token, unique: true
+
+    create_table :oauth_access_tokens do |t|
+      t.integer  :resource_owner_id
+      t.integer  :application_id
+
+      # If you use a custom token generator you may need to change this column
+      # from string to text, so that it accepts tokens larger than 255
+      # characters. More info on custom token generators in:
+      # https://github.com/doorkeeper-gem/doorkeeper/tree/v3.0.0.rc1#custom-access-token-generator
+      #
+      # t.text     :token,             null: false
+      t.string   :token,             null: false
+
+      t.string   :refresh_token
+      t.integer  :expires_in
+      t.datetime :revoked_at
+      t.datetime :created_at,        null: false
+      t.string   :scopes
+    end
+
+    add_index :oauth_access_tokens, :token, unique: true
+    add_index :oauth_access_tokens, :resource_owner_id
+    add_index :oauth_access_tokens, :refresh_token, unique: true
+  end
+end