adds basic 'my account' page

Fields related with authentication are not included
because the auth system will change to integrate with 
Madrid.es's Ciudadano360
ref: #22

app/controllers/account_controller.rb

@@ -0,0 +1,23 @@
+class AccountController < ApplicationController
+
+  before_action :authenticate_user!
+  before_action :set_account
+
+  def show
+  end
+
+  def update
+    flash[:notice] = t("flash.actions.save_changes.notice") if @account.update(account_params)
+    redirect_to account_path
+  end
+
+  private
+    def set_account
+      @account = current_user
+    end
+
+    def account_params
+      params.require(:account).permit(:first_name, :last_name)
+    end
+
+end