ENH: adds new collation actions for GenomeData[Genes] and GenomeData[Proteins]

[VinzentRisch]

closes #372

• adds new collation actions for GenomeData[Genes] and GenomeData[Proteins]
• refactors code for collation actions for loci and ortholog annotations with one helper function

[VinzentRisch]

Hey @misialq
Do you agree with these changes? I created a helper function that handles all collations of loci, proteins, genes and ortholog annotations.
Before the collation of loci only handled artifacts that were not per sample. The new one can also handle per sample data.
I also removed the check for if the file already exists with the warning, because this is not done somewhere else. Or do you think this is something that would be beneficial?

[misialq]

Thanks @VinzentRisch, looks good altogether but please see some specific comments below.

[misialq]

Hey @lizgehret, this looks good to go for me, unless you want to have a look!

[misialq]

👍