Internal colname messages

[karissawhiting]

What changes are proposed in this pull request?

Update internal processing of input data set names. Currently any passed genomic data is resolved to a set of internal data field names for all functions. This makes it confusing when warnings are thrown using internal assigned names, not original data set names.

If there is an GitHub issue associated with this pull request, please provide link.

#302

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[karissawhiting]

@hfuchs5 - Could you double check there aren't any spots where I missed this column name replacement? I updated it in sanitize data functions and also create_gene_binary()

Also if you could stress test it a little more that would be great as I did end up changing quite a few internals. Thank you!!!!