- slowly working towards have a working basis again :
 * switched all old require js modules to node modules with exports
 * modified/ cleaned up some basic geometric classes
 * added a modified version of THREECSG as internal dependency (for now)
 * removed "singleton" version of kernel
 * removed useless test stuff from kernel
 * started adding some (for now unused) tests for geometries
- progressive overall cleanup, adding of tests, experimenting, nothing functional so far