Revert "update QR code lib and calls to it"

This reverts commit 7050452fffdddd5aa355dc3d5d64f00cbb0c698b.

Conflicts:
	html/index.html
Revert "Revert "update QR code lib and calls to it""

This reverts commit cf1f3adc25a81deb54d1bc71b4a8e7623054bf5f.