heterotachy.py handling of taxon names

[atice]

Substitute taxon names with temporary IDs as in fast_site_remover.py to facilitate use on non-PhyloFisher derived datasets.

[michelleleger]

For what it's worth, renaming the taxa in Phylip format, or converting the file to strict Phylip, didn't work for me - what ended up working was changing the input to fasta format (in PhyloFisher v.1.1.1)

[atice]

Thanks for this bit of information Michelle!