SimpleImg 'from Mat' ctor
rename 'tests' dir
moving tests to separate file
cleanup main (removed tests after pushing them to test_streamHog
put allocate_hist() in helpers.cpp for all to see/use
fighting two or three different segfaults: the LUT seems to have an obscure segfault, plus splitting out a wrapper for the one-scale test seems to cause a segfault.
maybe the LUT isnt related to the segfault
AHA. need to pass SimpleImg by ref
fixed: pass by ref, doesnt free now. good
running multiscale now
pretty sure we're faster than ffld
good enough... should run valgrind at some point; and diff against old code