rough outline of confirm_shipment action
can now submit order_confirmation feed
Merge branch 'master' into feeds

Conflicts:
	Gemfile
	Gemfile.lock
Adds dotenv
Ops... removes binding.pry
Uses Amazon Credentials through env variable / dotenv
parser class returns feed submission id
puts feed_type and action in instance variables
Tries to use Time.stub instead of Timecop.freeze, since Timecop isn't
preserving Timezone.
Removes binding.pry
can now get feed status
Updates ENV variables names to match with the parameters names; Adds
pending test for confirm_shipment
Moves feed_type to Feed Objects
Adds InventoryAvailabitity Feed
use env vars for endpoint_spec
raise error if initial feed submission returns error response
processor returns either notification:error or info depending on feed result
use parser to return feed:status message
passing spec for feed_status action
passing spec for confirm_shipment action