Add cancan and rolify; add sanitized params to sign_up; include cancan ability class; creates users_roles table; edit temporarily new user view and allows new users sign_up; defines rails_admin to use cancan; defines rolify to create new roles easily.
merge from master
create clear seed
Added reversr parser for localization of PaperTrail gem. Enjoy! ;)
Merge branch 'develop' of github.com:CodePolaris/subprefeitura into develop
Make permissions work. Need some beauty improvements; ignore rbenv configurations; create table roles migration changed.
Improves permissions definition in ability.
Added index graphs on appoitments, projects and tasks.
Had to remove pjax from rails_admin.rb since it was breaking the javascript on dashboard because it apears to load some code from de index.haml.html files. (???).
To retrive pjax just delete the app/assets/javascripts/rails_admin/rails_admin.js file or add the pjax requirement.
Changes relationship between users and roles.

Changes the relationship from has_and_belongs_to_many :users_roles to belongs_to :role; not using anymore intermediate table 'users_roles'.
Changes the create_table_roles migration to not create the 'users_roles' table.
Improves permissions

Removes 'perm_temp' field.
Makes permissions rendered by a partial.
Add '.rbenv-gemsets' and 'gems/' to gitignore.
Fixed task with empty requestor bug on charts.
Added some testing.
Improved charts with legend and percentages.
Merge branch 'develop' of github.com:CodePolaris/subprefeitura into develop
Merge and test.

Test - Unauthorized fields in permissions
Merge of develop in feature/authorization
Merge branch 'develop' into feature/authorization
Fixes permission test.
fix roles migration
Added Calendar on Appointments. :D
Added some minor requested implementations and layout improvements on history.
Merge branch 'develop' into feature/authorization