Automatic Flux calibration

- fluxcal() has been automated in the following way. Standard's
parameters bandwidth and bandsep have been defined to create several
bandpasses in the standard star regardless of wavelengths being within
or without chip gaps and telluric absorption lines. Then, we go into the
output std.txt file, and delete those rows whose first column number
(wavelength) falls within chip gap or telluric absorption line
wavelength ranges. Sensfunc can thus also be automated by setting
'interactive'='no'.
- There appears to be an issue with standard related to user input
redirection in python/pyraf/iraf (on aschere at least). Instead of
waiting for the user to input a star_name in onedspec.standard, pyraf
automatically inputs the empty string ('') ~3 times which leads
onedspec.standard to crash and thus the pipeline to crash. This is most
evident in indivtasks().
- The auto-flux-cal algorithm does work because it has been tested in a
case where the star_name ('l4364') is known (SN2012cg) and so star_name
was set manually in a script and the output is comparable to if not
better than manual definition of bandpasses.