Adding digital/ebook to hash, disabling/enabled of qty

	modified:   app/assets/javascripts/spree/frontend/spree_variant_options.js
	modified:   app/models/spree/variant_decorator.rb
Version bump

	modified:   spree_variant_options.gemspec
Merge pull request #8 from deseretbook/BkQJkCO5-digital-considerations-on-cart-form

Digital considerations on cart form
Merge pull request #9 from deseretbook/2-3-stable

2 3 stable