Changeset [f8bc2125d7f477a4c153d3b5a1b5813fed2e425f] by Robert Buels

refactor BioperlFlattener's approach to flattening to arrayrefs for use by the NameHandler: make a flatten_to_name method instead of having it take a callback in its constructor, so that the name flattening and the feature flattening do not have to happen at the same time
https://github.com/GMOD/jbrowse/commit/f8bc2125d7f477a4c153d3b5a1b5...