Create skills rake task

* Creates skills csv file
* Creates a class that manages all related with skills
* Creates a rake task to import all skills
Create skills rake task

* Creates migrations for skill types
* Updates db/schema
* Adds specs for skill/sync file
Create skills rake task

* Updates skills/sync file
* Updates skill rake task to add skill types and remove all info
* Add fabricator for skill type
* Remove commented code in skill fabricator
* Adds specs for lib/skills/sync file
Create skills rake task

* Creates skill_type model
* Adds relationships between skills and skill types
* Ads specs for skill and skill types models
Create skills rake task

* Updates edit view with the proper collection
* Fix issue with skills task
* Fix specs for user views
* Adds code in the users controller that should go to a helper
Create skills rake task

* Move code from controller to helper
* Adds validation to user model
* Edit edit users page to use helper method
Create skills rake task

* Adds specs for user model validation
* Adds specs for user helper method
Create skills rake task

* Adds scope to skills model
* Refactor code in users helper
* Fix helper method call in edit user view
Create skills rake task

* Fix failing specs
Merge pull request #61 from crowdint/chore/create-skills-rake-task

Chore/create skills rake task
Merge branch 'master' into chore/add-missing-styles-badge-show-page
Adds missing styles for badge show view

* Removes join table badges_users
* Create badge_users model (intermediate between users and badges)
* Updates db/schema
Adds missing styles for badge show view

* Create fabricator for badge_user model
* Adds specs for badge_user model
* Fix specs for user
Adds missing styles for badge show view

* Adds relations to badge_user and user model
* Fix badges_engine_badge initializer
Adds missing styles for badge show view

* Creates method to get the proper info in user model
* Creates helper method to format the date
* Update partial with new method
Adds missing styles for badge show view

* Adds specs in user model spec
* Adds specs in badges helper spec
* Fix failing specs