cleaned up tests in main.cpp
more cleanup
trying mag image as uchar. output results look the same as with mag as float img. looks like opencv's 'write to file' code isn't doing any goofy normalizing or anything like that.
back to a reasonable configuration, with mag img as a Mat<float>
save magnitude to csv (to debug HOGwild fixed-pt hog)
debugging hogwild
planning to do some vectorization