Merge branch 'namespace_endpoints' into digest-2
Isolated readMetrics, stubbed aggregation methods.
WIP aggregateSeconds, and some goapp fmt stuff.
Drafted aggregateSecond. No endpoint.
WIP getAggregates.
Drafted aggregateSecond endpoint.
Drafted aggregateMore to generalize minutes, hours, and days.
Merge branch 'master' into digest-2

Conflicts:
	app/metric.go
Merge pull request #4 from mgbelisle/digest-2

Digest 2
Merge branch 'master' of github.com:mgbelisle/performanceboard into graph-2
Moving to namespace.go