creating first route and controller, and getting localhost:3000/pictures to work
fix spelling mistake controller
showing pics at /pictures'
each pic shows in its own page using static routes
refactoring show pics using dynamic routes
Adding feature to create new picture using rails form tag
 Creating Picture model in db
Moving @pictures in pictures_controller.rb into database
Refactoring to save new pictures in database
Configuring root as pictures#index
Refactoring views to use helpers and adding navigation
Adding feature to edit pictures
Adding feature to delete pictures
Refactoring routes to use resources