added analysis attribute to collection
added distance-based em algorithm
added some useful scripts
edited emtrees
added ml method and moved to algorithms.py
added comma
updated usage
added ml methods and changed input type to Collection
minor fixes
added working ml methods
updated for other methods
added parallel testing script
deleted temp files
silenced phyml output
added tmpdir input to emtrees
fixed input_tree pathing for multiple instances
added test maximise function
added exception for systems without skearn module
fixed minor issues
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