Fix hash order wuen generating query
Update dependencies
Add active_support as runtime_dependency
Remove warning from README
Fix dependencies
Fix failing test
Add make_structured_list to query helpers
Add support for Feeds api xml envelopes, Content-MD5 working.
Fix envelope xml generation and Content-MD5
Remove typo and unecessary info
Extract amazon envelope to its own class
Change envelope class structure
Add a few xsd for further validation
Add validations to xml envelope using nokogiri
Remove the need of passing merchant_id to submit_feed
Remove unnecessary xml nodes created during Hash#to_xml
Add OrderFulfillment.xsd validation
Add complete xml validation
Update dependencies
Complete dependencies