from the demo tar.gz
chmod -x on all files
flip -u on all files
remove whitespace at the end of the lines
remove vestigial files
mv io_png, libNumerics and libMatch to lib folder
add autotools build system
use vector in place of stack array buffer
inline and const a few functions
template struct keypoint
change default image size to 256x256

This makes the computations run in about 5 seconds rather than 30.