updated the pnccdModuleSubtract() in detectorCorrection.cpp so that it uses the shadowed pixels from the pixel mask, made sure so that only when cmRange > 0 the common-mode mean-correction is labelled PIXEL_FAILED_ARTIFACT_CORRECTION, changed the mode of all files in /source/libcheetah/src/ and /source/libcheetah/include/ to 644 (-x), removed unnecessary printouts in worker.cpp and histogram.cpp, fixed compile warning in peakDetect.cpp