implements custom target levels for species NPR trees and fixes a little problem when discarding target nodes due to parent identity
incorporates strict/relax monophyly of the target levels through the ~ symbol. Improves COG sorting by prioritization for less represented species. Improved task recycling by means of a more accurate checksum analysis of genetree workflow within concat_alg tasks
better cog sorting. Improved info and error handling about selected cogs
fixes problem in gentree workflow