Added node_memory_buffer, node_memory_swaptotal to meminfo_bsd (#451)
Added node_memory_buffer, node_memory_swaptotal to meminfo_bsd (#451)



knweiss/node_exporter,Jean-Daniel/node_exporter,ema/node_exporter,bs-github/node_exporter,siavashs/node_exporter,chosenken/node_exporter,chosenken/node_exporter,bs-github/node_exporter,siavashs/node_exporter,Jean-Daniel/node_exporter,joehandzik/node_exporter,derekmarcotte/node_exporter,Jean-Daniel/node_exporter,siavashs/node_exporter,bs-github/node_exporter,chosenken/node_exporter,siavashs/node_exporter,chosenken/node_exporter,derekmarcotte/node_exporter,ema/node_exporter,prometheus/node_exporter,joehandzik/node_exporter,knweiss/node_exporter,joehandzik/node_exporter,ema/node_exporter,derekmarcotte/node_exporter,prometheus/node_exporter,ema/node_exporter,knweiss/node_exporter,prometheus/node_exporter,derekmarcotte/node_exporter,bs-github/node_exporter,joehandzik/node_exporter,knweiss/node_exporter,Jean-Daniel/node_exporter