include some diagnostics
avoid NPE
reinstate old interpolator, to get back to working set of tests
fix data, so it's continuous
introduce sources for commons math
register commons math sources
switch to zipped math sources, not expanded
better test case
make tracks fire events when they are moved
introduce new class, that dynamically updates when its dragged
refactor, to pull out infill segment into its own class
create import/export handler for this new type
storing actual infill segment
declare the new handler
allow reification from just the segment names - on plot load