Gauges are constant until overwritten, and not reset at flush time.
Implement gauge delta updates.
Be more robust.
Merge pull request #19 from lambdafu/lambdafu/gaugefix

Gauges are constant until overwritten, and not reset at flush time.
Version bump.
Nano-optimization is the root of all beauty.
Merge pull request #22 from lambdafu/lambdafu/gaugedelta2

Lambdafu/gaugedelta2
Version bump