new file in rango app
renamed file form.py to forms.py and basic imports
created form to category
 defined page form
written view to treat category form
tempalte to render add_category
fixed typos
defined method to fix url in page forms
view to add page to category
adding pages to categories
not showing button to add page when category does not exist.
user model
created model ProfileUser
added forms to authenticate and upload files of a user
view register
register view
new url pattern in rango/urls.py