Signaling the quantization matrix in the bitstream

subset1:
           RATE (%) DSNR (dB)
    PSNR 0.175964 -0.009966
 PSNRHVS 0.198646 -0.0118349
    SSIM 0.186638 -0.00879532
FASTSSIM 0.25646 -0.00827182

video1:
           RATE (%)  DSNR (dB)
    PSNR 0.01025  -0.00053
 PSNRHVS 0.01206  -0.00089
    SSIM 0.01025  -0.00047
FASTSSIM 0.01148  -0.00066

Conflicts:
	src/pvq.c