Adds voting functionality

* Modify migration for create votations table
* Updates db/schema file
* Reduce routes for votes and votations
Adds voting functionality

* Adds previous route for votations
* Fix scope in votations
* Adds more actions for admin votations controller
Adds voting functionality

* Adds links in admin votation#index view
* Adds links in admin votation#new view
Adds voting functionality

* Creates admin votations#previous page
* Creates admin votations#show page
Adds voting functionality

* Remove update from voting restrinct routes
* Fix failing specs
Adds voting functionality

* Adds links for admin votation#index
* Adds links for admin votation#previous
* Adds actions in admin votation controller
Adds voting functionality

* Adds dependent: :destroy for votation and votes
* Changes MVP title for votation title
* Adds condition on previous and index view
Adds voting functionality

* Adds new redirects in admin votation controller
* Adds new redirects in votes controller
* Adds groups and exclude files for simplecov
Adds voting functionality

* Adds specs for admin votation controller
* Adds specs for votation model
* Adds validation in vote model
 Adds voting functionality

 * Fix broken specs
Adds voting functionality

* Fix links an all votation section
* Remove votation from main menu
* Fix specs
Merge pull request #86 from crowdint/feature/voting-mvp

Feature/voting mvp