Phot2lc

> Added support for the KPED instrument on the Kitt Peak 2.1m
> Changed the Layout of the Divided Light Curve Panel so that
the comparison star light curve and divided target light
curve share the same x-axis for easier identification of
bad point removal.
> The "s" key command now toggles the display of deleted
summed comparison star points in addition to the divided
light curve points.
> Changed the matplotlib backend to be system dependent for
the quicklook program. QT5Agg was distorted on some
Linux machines, switched to using TKAgg.

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> Command line option description and RTD docs updates

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> Fallback to DejaVu Sans Mono for non macOSX platforms

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> Chooses between QT5agg and TKagg backends for different
platforms.
> Updated the RTD documentation

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> Small bug fixes