README: mention python-flaskext.wtf as a dependency
README: mention python-flaskext.wtf as a dependency

nonas/debian-qa,matthieucan/debsources,Debian/debsources,devoxel/debsources,devoxel/debsources,clemux/debsources,zacchiro/debsources,sophiejjj/debsources,matthieucan/debsources,devoxel/debsources,vivekanand1101/debsources,Debian/debsources,oorestisime/debsources,clemux/debsources,devoxel/debsources,Debian/debsources,matthieucan/debsources,Debian/debsources,vivekanand1101/debsources,nonas/debian-qa,nonas/debian-qa,clemux/debsources,oorestisime/debsources,zacchiro/debsources,sophiejjj/debsources,vivekanand1101/debsources,zacchiro/debsources,nonas/debian-qa,devoxel/debsources,zacchiro/debsources,oorestisime/debsources,Debian/debsources,oorestisime/debsources,sophiejjj/debsources,sophiejjj/debsources,vivekanand1101/debsources,zacchiro/debsources,sophiejjj/debsources,matthieucan/debsources,oorestisime/debsources,clemux/debsources,clemux/debsources,matthieucan/debsources,vivekanand1101/debsources