Recfactoring of DRP to produce final data products

[ajmejia]

Implementing refactoring of the DRP to naturally produce the following science products:

• lvmFrame (extracted, wavelength-calibrated, and spectrograph-stacked, flatfielded data)
• lvmFFrame (flux-calibrated data)
• lvmCFrame (channel-combined, flux-calibrated data)
• lvmSFrame (sky-subtracted data)

Main changes are:

• Updating blueprints for final dataproducts
• Integration of data products as classes in lvmdrp.core.rss module
• Propagation of fiber tracing information into extracted frames (as polynomial coefficients)
• Propagation of wavelength and LSF fittings (as polynomial coefficients)
• Integration of RSS rectification

NOTE:

The following products will be implementing in a different PR:

• lvmRSS (exposure-stacked data)
• drpAll (DRP summary product)

This branch requires merging #47 and #48 first.