WIP - still need to do something

Signed-off-by: Martha Berner <marthaberner.mb@gmail.com>
Merge branch 'add-product' of github.com:gSchool/g2-store into product-show-page

Conflicts:
	app/views/products/new.html.erb
[#71428528] Author and Publisher cannot be blank

added validations and error messages

Signed-off-by: Scott Skender <sjskender@gmail.com>
Merge branch 'product-show-page'
Merge branch 'master' of github.com:gSchool/g2-store