Update guide for new stream based API
Update guide for new stream based API

ixiom/pdfkit,bpampuch/pdfkit,moyogo/pdfkit,ashelley/pdfkit,moyogo/pdfkit,ixiom/pdfkit,greyhwndz/pdfkit,jkol/pdfkit,jordonbiondo/pdfkit,datphan/pdfkit,datphan/pdfkit,pomahtuk/pdfkit,mauricionr/pdfkit,devongovett/pdfkit,aendrew/pdfkit,greyhwndz/pdfkit,devongovett/pdfkit,backspace/pdfkit,pomahtuk/pdfkit,gabrieldelatorreicg/pdfkit,joadr/pdfkit,jkol/pdfkit,jordonbiondo/pdfkit,billcowan/pdfkit,billcowan/pdfkit,gabrieldelatorreicg/pdfkit,joadr/pdfkit,gradecam/pdfkit,mauricionr/pdfkit,gradecam/pdfkit