[WIP] Continuum normalization#291

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alexji wants to merge 6 commits intoastropy:mainfrom

alexji:continuum-norm

Commits on May 6, 2020

First draft of continuum normalization

alexji
authored and
nmearl
committed
Added direct port of linetools continuum

alexji
authored and
nmearl
committed
Documentation and variable name fixes

alexji
authored and
nmearl
committed
Draft fitter for spline models

alexji
authored and
nmearl
committed
Rebase and clean up to better match current specutils
nmearl
committed

Commits on May 7, 2020

Fixed spline model errors
alexji
committed