Restrict action for only the consumer and accept float quantities
Adjust ordered product controller

  * Add more security
  * Fix quantities as float
  * remove when qtt is negative
  * limit to minimum selleable
Add class for error-message
Fix block being showed with no message to show
Update also the sesssion products column
Adjust to case in which quantities are <=0
Fix security issue. Defined admin action in the view. Passed to
controller
Show error message on quantities <=0
Update profile's block usage
Merge branch 'distribution-plugin' of git.preface.com.br:noosfero into distribution-plugin