Added bootstrap
Add validations
Added tests for validations
Added validations, more CSS, and tags
Added filtering by tags
Moved images to spec folder, modified navbar
Refactoring tests
Merge branch 'new_validations' into develop

Conflicts:
	app/controllers/submissions_controller.rb
	app/models/submission.rb
	app/views/home/index.html.erb
	config/routes.rb
	db/schema.rb
	features/submission.feature
	public/system/submissions/photos/000/000/001/medium/cats.jpg