Creat formulari de ciutat:

	new file:   web/gestorFestes/forms.py
	modified:   web/gestorFestes/models.py
	modified:   web/gestorFestes/templates/ciutats.html
	new file:   web/gestorFestes/templates/form.html
	modified:   web/gestorFestes/views.py
	modified:   web/web/urls.py