resize qr code follow display size

[anunpanya]

https://github.com/anunpanya/QRGenerate/blob/master/qrgenerate.cpp

See void render() and void createQR().

edit line 37
for (byte x = 0; x <WD; x + = 2) {.
to
for (byte x = 0; x <WD; x + = pxSize) {.

Trial sample files In order to understand
https://github.com/anunpanya/QRGenerate/blob/master/examples/example/example.ino