adding Level integer field to lessons
adding a level presence and uniqueness validation in lesson and updating seed action and factories to include a level
adding shoulda tests for lesson#level validations
fixing factory to allow for multiple lesson
setting up factories so i can make multiple questions/quizzes without validation errors
method to return all completed quizzes
methods to obtain access levels on a specific user
method to return assigned lesson on a specific user
Merge pull request #7 from SunnyIzr/adding-sequentiality-of-lessons

Adding sequentiality of lessons