command line interface

[forero]

This addresses #89 and dissolves #23 . Fiberassign uses now a command line interface

Using the files in /global/cscratch1/sd/forero/fibertest the new interface can be tested as:

fiberassign -mtl mtl.fits -sky sky.fits -star star.fits -surveytiles surveytiles.txt -outdir ./ -footprint tile.fits -positioners /global/common/cori/contrib/desi/desiconda/20170613-1.1.4-spectro/code/desimodel/0.9.0/data/focalplane/fiberpos.txt -fibstatusfile fiberstatus.ecsv 

or by setting another run date

fiberassign -mtl mtl.fits -sky sky.fits -star star.fits -surveytiles surveytiles.txt -outdir ./ -footprint tile.fits -positioners /global/common/cori/contrib/desi/desiconda/20170613-1.1.4-spectro/code/desimodel/0.9.0/data/focalplane/fiberpos.txt -fibstatusfile fiberstatus.ecsv -rundate 2010-02-21

[sbailey]

Yay for command line options to control the different input files locations. Thanks.

For standardization with other desi code, I updated it to use double-hyphens for long-name options, e.g. --outdir instead of -outdir etc.

However, it could still be useful to have an optional config file with the ability to specify these parameters, including the ones that are now in Feat::Feat(). e.g. we will especially want to experiment with different densities of standard stars and sky fibers.

I'll merge this for now and open a new ticket about re-introducing a lighter-weight and optional features file.