Optimization pass #70
Optimization pass #70

Includes:
    * Do not allocate mem in fit for train/monitor diagnostics
        * train: start_resid, end_resid, slope_resid
        * monitor: predictions, scores
    * use JIT-ed rmse calculation when possible

valpasq/yatsm,valpasq/yatsm,ceholden/yatsm,ceholden/yatsm,c11/yatsm,c11/yatsm