Merge branch 'ws-rspec' into ws-specs-db-modeling

Conflicts:
	app/models/position.rb
adding spec for area model
adding spec for level model
add specialization to position
adding specs for position  model
fixing position skill association
adding specs for position skill
updating README. How to run specs
Merge branch 'vs-new-db-modeling' into ws-specs-db-modeling

Conflicts:
	app/models/position_skill.rb
duplicated skill_id into schema
Merge remote-tracking branch 'origin/db-redesign' into ws-specs-db-modeling
specs for user
adding specs for ws-specialization-weight
Merge pull request #30 from Bionexo/ws-user-spec

User Specs
Merge pull request #31 from Bionexo/ws-specialization-weight

adding specs for ws-specialization-weight
Merge pull request #34 from Bionexo/ws-specs-db-modeling

Ws specs db modeling