Improve longterm graph display

[fiveohhh]

When looking over a long period of time, only individual points are used.

Within a day these swings can be huge and the actual weather isn't accurately represented. Maybe average a days temperatures?

[fiveohhh]

Maybe at the end of everyday run a report on statistics for that day, highest, lowest, average for each temp. Could maybe bundle this in with the hvac usage, since it is all post day processing... This will shorten up longterm, greater than a few months, as we won't even have to touch the detailed database.

[fiveohhh]

Daily summary could contain max, min, avg, and link to hvac usage? not sure how to handle this, have a nightly cron that runs after the hvac usage?