v1.03

Added continuous analogues of first crossings

CO_FirstZero and CO_f1ecac combined into CO_FirstCrossing, and added discrete (first time lag the ACF exceeds the threshold) and continuous (linear interpolation for the crossing estimate, between previous and subsequent time points).
Also an issue with BF_PreProcess consistency and with 'absclose' being incorrectly set to 'saturate' causing an issue for DN_RemovePoints