updating parent nodes of licas when we add new descendants
Merge branch 'master' of github.com:OpenTreeOfLife/treemachine into importer_testing
updating parents with new lica mappings
cleaning up graph importer
cleaning up
needed for proper tree loading
Merge pull request #50 from OpenTreeOfLife/importer_testing

Cleaned up the GraphImporter class and fixed a bug where lica properties for parent nodes of newly-mapped lica nodes weren't getting updated with the new child mappings.