changed the index.html.twig to display the animal object
added a set in addAction to save data in db and findAll in index to show all data
improved the display od server data
generate the type animal for the form by doctrine:generate:form TutorialAnimalsBundle:Animal
added Form\AnimalType to addAction form
added the current date
hide the date field
changed the type of url field in url type
changed the description field from required to not required
improved the form add controller
Merge pull request #4 from antonioJs/form-creation

Form creation