verify that data folders are properly cleaned out on data loading

[srkline]

sometimes, I'm not so sure that this is being done correctly

if i create "extra" waves for testing, the are not automatically wiped out if new raw data is loaded

[srkline]

also, try the same cleaning operations when one or more waves are in use in a table or a graph

walk through the tree and search for the "bad" waves and figure out why they aren't being removed

Document and automate the tests so that they can be repeated in the future in case more folders/features are added, to be sure that it still works.

[srkline]

I think I've got a lot of this taken care of - the folders are walked through and waves are all killed one-by-one.

This is absolutely necessary since not all data files will have the same blocks of information - temperature, polarization components, etc. are only written out if they are part of the configuration. Then simply copying the data folder will interleave the copy, not wipe the old out and write in the new.

Should be All OK now.

[srkline]

appears to be OK for now.