typo
move rrd settings to config so its more natural to change
Change default RRAs to make better use of space.  Chose a point that
seemed between what the old comment intended and the settings did.

The old settings were storing 1209600 data points, or 840 days with a 60
second step
Merge pull request #11 from cburroughs/rrd-config

Move RRA configuration to config file, make it use lest disk space by default.