Remove obselete parts of the README.
Remove obselete parts of the README.

jasco/WeasyPrint,Kozea/WeasyPrint,marclaporte/WeasyPrint,prepare/TestWeasyPrint,andrewleech/WeasyPrint,prepare/TestWeasyPrint,jasco/WeasyPrint,marclaporte/WeasyPrint,Kozea/WeasyPrint,andrewleech/WeasyPrint