[resources]: color voting based paper
[swt]: vectorize a couple loops
[filter_ccs]: return coarsely filtered components

helpful for debugging
[filter_ccs]: tune variance threshold
[filter_ccs]: minor cleanup of coarse filtering
[filter_ccs]: more cleanup
[filter_ccs]: replace filtered ccs with -2 for debugging
[filter_ccs]: morphological erosion check for components too small
[filter_ccs]: comment out gradient code for now

We have some ideas on how to make this work, but it's broken
right now.