Calcos v3.4.0
Added unit tests (resolves #207)
Added code to enable split wavecal processing in calcos for LP6 (resolves #194)
Added code to transfer wavecal solution from one segment to another when no wavecal lines in science segment (resolves #198)
Added warning when users try to process rawtag or corrtag when no tagflash in data, wavelength calibration will be incorrect (resolves #188)