refactoring database relations
removing unused tests
Merge branch 'ws-skill-levels' into db-redesign
Merge branch 'ws-position-seed' into db-redesign
Merge branch '1.0' into ws-new-db-modeling

Conflicts:
	app/models/area.rb
	app/models/position.rb
	app/models/profile.rb
	app/models/skill.rb
	app/models/skill_level.rb
	app/models/specialization.rb
	db/schema.rb
Merge branch 'master' into db-redesign
Merge pull request #25 from Bionexo/ws-new-db-modeling

Ws new db modeling
creating PositionSkill's view
removing duplicates add column in PositionSkill
Revert "creating PositionSkill's view"

This reverts commit 12eb85c40d821dfb6766b602fa9404a18272719a.
Revert "removing duplicates add column in PositionSkill"

This reverts commit 44de419113f472c01d756b7b5a0a1f60ca35b64f.
creating PositionSkill's view
Resolving problems in view
Updating the diagram
Adding references in models
Deleting files about skill_relevance, role_users, role and proficiemcy_level
Adding references in models
Adding references in models
cleaning and organizing Gemfile
adding rspec for spec testing