Commit prior to incorporating miniz compression
-- Noticed some issues with USB OTG port when cameras were connected to it--sometimes gave error 'musb_host_rx 1625: Rx interrupt with no errors or packet!' which would cause image capture to stop.  Couldn't find an easy workaround, so went back to putting cameras and wifi in main USB port.
-- Finished mod of camera-server.cpp to break out of forked receive process when no image data received--no significant speedup.