Rewrite Navigator to run without Flask.
Rewrite Navigator to run without Flask.

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