Removed marginal tree traversal stuff.
Lots of renaming to replace "recombination" with "conversion"
Added classes representing regions and marginal trees.
Taking too long.
Updating likelihood to allow for overlaps.
Finished draft of new likelihood class.
Working on marginal tree construction.
Moved CF event list out of ConversionGraph.
Added ACG event list class.
Extracted RegionList from ConversionGraph class.
Fleshing out marginal tree assembly.
SimulatedRecombinationGraph no longer SNI.
Restarted CI on new code. (Will fail.)