Added a bunch of gems 
- better_errors
- binding_of_caller
- quiet_assets
- pry-rails
- pry-rescue
- pry-byebug
-rails_12factor
-pg
-devise

Added gemset and ruby-version

Changed database.yml to postgresql.
generated devise user models and views
generate static_page controller
Create book model and associations with Users.
generate books_controller and views.
Add bootstrap and simple form gems.
put container around yield.
added a navbar for visual cue of being logged in.
rendered form in #edit
Added cancel button to form.
Changed index to only show owned books.
Added basic #show functionality.
changed index to show current_user's books

Assigned current_user to book.user_id