Clean up and fix response data

The API should not return invalid data, but it does sometimes.
Readme: added debugResponse to setup()
Readme: added API methods section
Readme: added get_accountdata
Readme: added edit_accountdata
Readme: added get_productlist
Readme: added get_isolist
Readme: added get_bootorderlist
Readme: added get_imagelist
Readme: whitespace