Notification System Pack

views.py -> The Login view checks the powers to init them if necessary.
settings.py -> The Action Stream models now has 2 models instead 4.
qubal_check_image.py -> code refactored, now the objects are extracted
using "for in"
qubal_prerender.py -> prerender_notifications now gets the user actions
list filtering if the notification has been shown or not, if not is
shown and then set to "shown"
qubal_rules.py -> User Actions filter improved thx to the data field
(mostrado = 'no')
index.html -> Code refactored.