actual domain-determined, base-10 log scale for BG pool
make stats widget BG floater use a log scale too
Merge branch 'master' into jebeck/bg-log-scale-2
Merge pull request #47 from tidepool-org/jebeck/bg-log-scale-2

BG data plotted on a log scale
Merge branch 'master' into jebeck/one-day-navstring