#5 Storage of summary data

[Ben Clewett]

Storing of summary data to alow great time scales
(epocs) to be retieved. Including epocs of 1 year and
more. Storage of data grouped by hour and day.
Storage of:

Start of epoc, UNIX time.
Number of values in epoc.
Sum of values.
Sum squared of values. (To get standard dev)
Max value.
Min value.
Min 'warn' value.
Min 'critical' value.
Max 'warn' value.
Max 'critical' values.

Then both auto and manual selection of raw, or summary
data.

Summary data displayed as a black average, with a
dotted line above and below for the standard dev, a blue
line above and below for max and min. Two yellow and
red lines for the bounds of the 'warn' and 'critical'
boundaries.

May be a problem defining start of day epoc, as daylight
saving time will distaught this over year. May have to
use GMT for day boundaries.