Add fasttree as alternative to RAXML

[iimog]

Hello @iimog,

Ok no problem, I will use proteome first. Can you also please add fasttree support. I understand that RAxML is the most accurate one but too slow for more than 30 genomes or so, for a GUI application, most use cases are personal computers like laptops, which will be slow. fasttree can be 10 times faster while provide almost identical result with RAxML, very useful for quick check of phylogeny of some genomes.

Thanks,

Jianshu

Originally posted by @jianshu93 in #50 (comment)