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

config/locales/es.yml

@@ -40,4 +40,8 @@ es:
       back_link: Volver
   votes:
     notice_thanks: "Gracias por votar."
-    notice_already_registered: "Tu voto ya ha sido registrado."
+    notice_already_registered: "Tu voto ya ha sido registrado."
+  account:
+    show:
+      title: "Mi cuenta"
+      save_changes_submit: "Guardar cambios"