plotter now adds sedfluxdep data automatically
Drivers, params, data

Mainly new and tweaked drivers and their params, in lead up to AGU.
Also some data files.
channel_profile cleanup

channel_profile returned profile IDs and distances upstream needlessly
within an extra list. This doesn’t occur any more.
TL functionality, stability improvements

1. Added a simple power law sediment flux function to
tl_fluvial_monodirectional_v3 (soon to become
tl_fluvial_monodirectional).

2. Modified stability scheme for this module so it applies for any flux
law (previously old scheme was only stable when a threshold was
present, suppressing channel variability at low angles).