dance_genre renamed to genre; tests for genres_controller; new, create actions in genres_controller
genres: index, show views; index, show tests
Merge branch 'genres' of github.com:kalashnikovisme/sky_dance into development

* 'genres' of github.com:kalashnikovisme/sky_dance:
  genres: index, show views; index, show tests
  dance_genre renamed to genre; tests for genres_controller; new, create actions in genres_controller

Conflicts:
	config/routes.rb
	db/schema.rb
nothing :)
put create in admin access in video_controller
add groups
add groups routes
edit db/schema.rb
add association to other models
add model category
some adds
add to category seeds
add categories_controller
add update, edit, destroy to groups, categories and videos
add lessons
re-redirected all to lessons_path