SKIL-4: Added model for teachers
SKIL-4: Added migration for teachers
SKIL-4: Added FactoryGirl for teachers
SKIL-4: Added spec for teachers model
SKIL-4: Controller moved to api/v1/, updated routing

Based on sg-skil-4-all-teacher-profiles
Added teachers and show action
Merge pull request #11 from lukezbikowski/lz-skil4-all-teacher-profiles

skil-4 teacher profiles
Added Shoulda
Added association User<->Teacher
- Added shoulda Gem
- added user_id to teacher
- Associated user<->teacher
- Fixed test belonging (description)
Merge pull request #12 from lukezbikowski/lz-associate-user-teacher

Added association user<->teacher
Create migration - add teacher id to course
Test course belongs to teacher
Add association for course belongs to teacher
Test for teacher should have many courses
Add association for teacher has many courses