Change models, new migrations, fix front and make tests work

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

priv/repo/migrations/20180109165738_create_accounts.exs

@@ -0,0 +1,22 @@
+defmodule Eventos.Repo.Migrations.CreateAccounts do
+  use Ecto.Migration
+
+  def change do
+    create table(:accounts) do
+      add :username, :string, null: false
+      add :domain, :string, null: true
+      add :display_name, :string, null: true
+      add :description, :text, null: true
+      add :private_key, :text, null: true
+      add :public_key, :text, null: false
+      add :suspended, :boolean, default: false, null: false
+      add :uri, :string, null: false
+      add :url, :string, null: false
+
+      timestamps()
+    end
+
+    create unique_index(:accounts, [:username, :domain])
+
+  end
+end