turn off masking based on sky spectra only

…30 values

change default to no gaussian smoothing for xcorr
raise specific exceptions rather than general
add raw ccpeak to xcorr output and use it for selecting initial model
add check for initial pars within bounds
fix major bug in multifit_lsq jacobian
   change step sizes for derivatives
add some memory cleanup
add xcorr of final model with each spectrum and put in output
modify to allow jointfit to run with single spectrum, for uniform interface
trap for failed initial RVs in jointfit, and remove these, but proceed with others
change weighting for initial paramters to be by S/N
change vscatter to use std and not mad

put in keywords for maxvel
add new continuum normalization to normalize obs and models the same way

mod for polynorm for 1D

fix velocity scale for xcorr

change fine grid range
handling of single visit returns to make multi-visit
handling of failed frames in single visit

add some exception trapping

fix velocity array for CCF
add BC to CCF velocity array
calculate full CCF, but just look for peak in input range