Inaccurate 7-day history

[micahalcorn]

Our homepage and analytics summary show a trailing 7-day APY that is higher than all of the prior seven days according to Proof of Yield. Both should be measuring the post-Dripper yield realized by OETH holders after fees based on the rebases that occur in the 7-day period. It is theoretically possible for this to be accurate if there is a huge yield event "today" (see #100). But we happen to know that this isn't true as of the date of these screenshots.