create LesssonPlan yml
Add files to contain fake data
Add test data for 1st LessonPlan: write simple Ruby program
Add spec for youtube video resource
Refactor and allow video resource to take youtube URL
Merge branch 'allow_video_resource_to_take_youtube_url' into first_lesson_plan
Fix escaped quotes in YAML file
Add description to Resource model
Add description attribute to Resource model
Validate Resource's description
Merge branch 'add_description_to_resource' into first_lesson_plan
Update YAML
Fix YAML syntax
Add tasks to generate sample lesson plans
Merge branch 'first_lesson_plan' into development