Statistics.csv and ulm2.dat are being appended if simulations are restarting

Samo Penic

2016-06-01 ac9826b40021798ad3c207f526f64950bc293fb2

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Original written by Dan Kroll in FORTRAN. Code was then largely adapted and commented by Miha Fosnaric-Fosni. Rewritten into C by Samo Penic-Peni, with help of Miha's extensive explanations.