Added trade unions

Server/db/migrations/4_create_table_roles_users.jl

@@ -0,0 +1,22 @@
+module CreateTableRolesUsers
+
+import SearchLight.Migrations: create_table, column, primary_key, add_index, drop_table
+
+function up()
+    create_table(:rolesusers) do
+        [
+        primary_key()
+        column(:roles_id, :int)
+        column(:users_id, :int)
+        ]
+    end
+
+    add_index(:rolesusers, :roles_id)
+    add_index(:rolesusers, :users_id)
+end
+
+function down()
+    drop_table(:rolesusers)
+end
+
+end