initial conversion steps
removing redundant classes
exposing draft tree mrca and subtree functions via plugins
Merge branch 'master' of github.com:OpenTreeOfLife/treemachine into ot-base_conversion
fixing knuckle tail bug
working out bugs in subtree method
working out bugs in subtree method
working out bugs in subtree method
fixing bugs in subtree method
fixing more bugs in subtree method
Merge pull request #87 from OpenTreeOfLife/ot-base_conversion

Ot base conversion