Update fee.xsd

Allow multiple "fee" and "credit" fields in transform commands and delete command responses (respectively).
Update transfer-command.xml

Fix typo in the transfer command example to use the "fee:transfer" element instead of the "fee:create" element.
Update update-command.xml

Fix typo in the update command example to use the "fee:update" element instead of the "fee:create" element.
Update draft-brown-epp-fees.xml.in

Add section for each transform command specifying that the fees MAY be required, depending on server policy. In that case error 2003 is returned.
Update draft-brown-epp-fees.xml.in

Fix the section describing the return parameters of a delete command. It was referencing the generic transform return types, but delete differs in that it returns a list of "credit" elements instead of "fee" elements.
Update references to "xml.resource.org" to point at "xml2rfc.ietf.org",
since they seemed to be 301'd there (and xml2rfc complains about them).

Also regenerated the .txt file with the RFC draft.
Merge pull request #2 from sethamin/master

Fix various typos, and add language that fees may be required by server policy