add link to issues#index in navbar
create issues#index template
create index method
make associations before saving objects
ignore public/systems files
add approved column to issues model
i only show approved issues in welcome#index
add update and destroy methods
refactor show action for unnapproved issues
refactor index action for unnapproved issues
add approved and unapproved scopes
add unapprove buttons for managing issues
add link for managing issues
add admin column to users
check for admin before manage issues path
remove comics from seeds
refactor redirect in update method
update readme