Added the `all` kwarg and implemented/tested it throughout.
Adding Megeath_Allgoodsources to UKvars_match().
Updated this oneoff to use Megeath_Allgoodsources!

Now it has 46 columns. Wrote successfully.
Updated this guy to use the newer mated_ukvar file.
Brought in megeath_all_by_ukvar and wrote make_megeath_class_column.

It seems to check out A-OK; I still need to put the function itself inside the table1 making function.
Wrote a long test_make_megeath_class_column. It passes py.test!

It's fairly thorough, although it doesn't independently make sure that I have flagged the CORRECT 'na' stars as 'ND', just that I haven't broken anything otherwise.
Cleaning up comments and docstrings.
Now we use make_megeath_class_column in table1.

This change took more work than it appears!
Runs without breaking.