move caffe wrapper/iface code from conv_pyra to caffeif.{cc,H}. add run_cnet mode (inside conv_pyra.cc for now) to run alexnet (or similar nets) with a labeled output layer like prob (where the labels are read from a synset file).
fix/change RGB->BGR channel swap for caffe
move run_cnet from conv_pyra->caffeif. break up run_cnet::main().
use run_cnet::do_predict() in cap_skel for each frame.