Maintain granularity in cpu data
Maintain granularity in cpu data

Export cpu mode times as original uint64_t data,
and update frequency, and do the conversion to
float64 and subsequent division in go.

siavashs/node_exporter,cbstewart9393/node_exporter,bs-github/node_exporter,knweiss/node_exporter,joehandzik/node_exporter,joehandzik/node_exporter,chosenken/node_exporter,bs-github/node_exporter,Jean-Daniel/node_exporter,mslocrian/flexswitch_exporter,joehandzik/node_exporter,derekmarcotte/node_exporter,knweiss/node_exporter,chosenken/node_exporter,prometheus/node_exporter,ema/node_exporter,knweiss/node_exporter,derekmarcotte/node_exporter,Jean-Daniel/node_exporter,ema/node_exporter,bs-github/node_exporter,prometheus/node_exporter,siavashs/node_exporter,Jean-Daniel/node_exporter,derekmarcotte/node_exporter,chosenken/node_exporter,mslocrian/flexswitch_exporter,siavashs/node_exporter,ema/node_exporter,cbstewart9393/node_exporter,chosenken/node_exporter,prometheus/node_exporter,joehandzik/node_exporter,derekmarcotte/node_exporter,ema/node_exporter,bs-github/node_exporter,siavashs/node_exporter,knweiss/node_exporter,Jean-Daniel/node_exporter