Adds shotgun
Uses model_un to convert US states
Adds pry & pry-byebug
Removes suffix get_ in the Amazon client
Lookups inventory_by_sku from Amazon; Minor refactor
Creates /get_inventory_by_sku endpoint
Removes hash[...] as it uses Hashie
Merge branch 'master' into feeds

Conflicts:
	Gemfile
	Gemfile.lock