Update README.pod

get_form no longer exists! MU-HAHAHAHAHAHAHA
Merge pull request #22 from garu/patch-1

Update README.pod
Merge pull request #23 from garu/master

documenting mandatory attributes for Item objects
Allow Item class to be customized by the gateway
Merge branch 'master' of github.com:andrewalker/p5-business-cpi
Remove call to isa on unblessed references
Make get_checkout_code a method, not an attribute
mandatory item attributes are mandatory