Comment out raw dump and add an fps printout every 10 exposures (gives ~17 fps)
Lock focus and exposure in beginCapture
Copy finder algorithm into GPUImage pipeline (with saving and UI updates disabled): reduces fps from 17 to ~4.3.
Change image orientation from portrait to landscape (otherwise image dumps are distorted)
Dump first exposure as a sanity check
Replace SepiaFilter with local copy of LuminanceThresholdFilter.