add :save() method to save histograms as CSV
add :save() method to save histograms as CSV

dschoeffm/MoonGen,werpat/MoonGen,schoenb/MoonGen,scholzd/MoonGen,emmericp/MoonGen,werpat/MoonGen,duk3luk3/MoonGen,dschoeffm/MoonGen,bmichalo/MoonGen,bmichalo/MoonGen,schoenb/MoonGen,wenhuizhang/MoonGen,gallenmu/MoonGen,slyon/MoonGen,NetronomeMoongen/MoonGen,kidaa/MoonGen,emmericp/MoonGen,slyon/MoonGen,kidaa/MoonGen,atheurer/MoonGen,pavel-odintsov/MoonGen,NetronomeMoongen/MoonGen,pavel-odintsov/MoonGen,gallenmu/MoonGen,emmericp/MoonGen,dschoeffm/MoonGen,slyon/MoonGen,NetronomeMoongen/MoonGen,pavel-odintsov/MoonGen,slyon/MoonGen,bmichalo/MoonGen,wenhuizhang/MoonGen,duk3luk3/MoonGen,scholzd/MoonGen,gallenmu/MoonGen,gallenmu/MoonGen,bmichalo/MoonGen,gallenmu/MoonGen,duk3luk3/MoonGen,atheurer/MoonGen,kidaa/MoonGen,gallenmu/MoonGen,schoenb/MoonGen,gallenmu/MoonGen,wenhuizhang/MoonGen,scholzd/MoonGen,werpat/MoonGen,atheurer/MoonGen,gallenmu/MoonGen