Added: New AssertEqual function. Function for restoring a run from any
XYZ file. System size as comment in XYZ files. Optimized updating of
accuallrates elements using iterators instead of lots of .at(). Added
sphericity estimate for the center crystal (ignis event). Fixed an issue
where you were allowed to initialize a crystal filling the entire system
(implies zero reactions active). Added misc. minor conveinience
functions. The singular potential energy is now infinite (double max).