build script fixes, add ldflags build option
update and enhance demos
fix bug in 4x grid oversampling
warn if writePNG called while compiled without libpng
make shapes in ShapeList const
and add many other const needed due to snowball effect
slightly optimize Camera::makeRayPacket using _mm_shuffle_ps
make Vector SIMD vectorization disabled by default (causes problems)
fix bug in implicit reflection of transmissive surfaces,
when surface's reflection parameter is set to zero
mkdir %1
cd %1
wget ftp://graphics.stanford.edu/pub/3Dscanrep/bunny.tar.gz
bsdtar xzf bunny.tar.gz
del bunny.tar.gz
rmdir /S /Q bunny\data
move bunny\reconstruction\* bunny
rmdir /S /Q bunny\reconstruction
wget ftp://graphics.stanford.edu/pub/3Dscanrep/happy/happy_recon.tar.gz
bsdtar xzf happy_recon.tar.gz
del happy_recon.tar.gz
move happy_recon happy
wget ftp://graphics.stanford.edu/pub/3Dscanrep/dragon/dragon_recon.tar.gz
bsdtar xzf dragon_recon.tar.gz
del dragon_recon.tar.gz
move dragon_recon dragon