Fix wrong metrics counter

refactor(influxdb series handling): performance and refactoring of PR #2179, also switched to InfluxDB epoch json format

Merge branch 'topic-multi-select-influxdb9' of https://github.com/randywallace/grafana into randywallace-topic-multi-select-influxdb9

Added Pressure units (mbar and hPa) and db unit

Added fix for template variables when no options are available to select

clarify which handler is not found

Capitalise panel menu items

It's a minor thing but other options seem to be generally capitalised. This felt discordant.

more work on influxdb 0.9 query editor and query builder, can now handle regex conditions, tag operator  and tag value quotes changes automatically depending if the tag value is a regex or not, #1525

Conflicts:
	public/test/test-main.js

Add docs of KairosDB Datasource Plugin