Graph: fix for downscaling y-axis format, never downscale when value is zero, Fixes #826
Support fields from nested objects pulled from Elasticsearch
Give maximum width & height constraint to tooltip boxes

Extreme values that go beyond the screen resolution are very likely to be misplaced. This is a simple workaround. A better solution would be to improve the code placing the tooltip and make it handle tooltips containing more content than they can safely display.
Annotations: Elasticsearch annotation and field mapping fixes, small changes for PR #830
Fixed spelling in config.sample.js
Merge pull request #42 from grafana/master

Pull in Upstream Changes