moved chain file for testing to yeti
Merge remote branch 'origin/snap' into snap
This is where I realized snapping was failing
Merge remote branch 'origin/snap' into snap
Merge remote branch 'origin/snap' into snap
changing logging lines
changed extents calculation

snapping to the grid can result in no dynamic range for some
model parameters; now the plotting limits are changed here
before being passed to the plotting codes
properly handle snapped chains/cropchains
properly snap chains, also some logging stuff and a merge leftover

changed snapping functions to deal with an uneven grid (i.e. one
with missing models)

The merge process didn't catch two conflicting definitions for
model_p, which caused untold amounts of frustration.
testing snap methods