Made major change to algorithm - replaced velements array in each ray with global hanging_vertex_element array that maps vertex->element. Now algorithm is cleaner and passes multigeneration test

added test for connectivity, refiner passes for single generation refinement, but fails multigeneration refinement

Fixed bug where elements was not being used to generate connectivity, and also, cleared velements when a midpoint had already been created when refining to make purpose of velements be only to store hanging node connectivity