closes #11180

Got added by mistake a year ago.

[ci skip]

Add color to prefix and postfix in singlestat panel

[ci skip]

* Seconds to HH:MM:SS format

[ci skip]

Prometheus heatmap support

Added concentration units and "Normal cubic metre"

docs: fix an outdated link to Prometheus's doc

ppm, ppb, ng/m3, ng/Nm3, μg/m3, μg/Nm3, mg/m3, mg/Nm3, g/m3, g/Nm3, Nm3
ppm was moved from "Dimensionless" and "submenu" to "Concentration"

Fix urls in plugin update_checker logs

[ci skip]

Cloudwatch dimension_values add dimension filter.

Adding Timeticks unit

(prometheus) support POST for query and query_range

Reported in #11176

build: upgrades build pipeline from CircleCI 1.0 -> 2.0

My hope is that headers will make it easier to read
when people post issues.

* mayli-master:
  Use B/s instead Bps for Bytes per second

* 'master' of https://github.com/mayli/grafana:
  Use B/s instead Bps for Bytes per second

* 'master' of github.com:grafana/grafana: (24 commits)
  docs: update latest to 5.0.1
  push 5.0.1 to package cloud
  changelog: adds release date for 5.0.1
  bump master build to 5.1.0-pre1
  move quota to dedicated service
  rename Context to ReqContext
  changelog: note about closing #11145 and #11127
  docs: adds note about closing #10632
  removes commented code
  removes unused variables
  upgrade to go 1.10
  alerting: fixes validation error when saving alerts in dash
  add csv templating format
  docs: note about closing #11046
  docs: adds note about #10942
  Documentation: path "~/go" to "$GOPATH"
  Update ROADMAP.md
  move Context and session out of middleware
  only use jwt token if it contains an email address
  hide row actions for viewers
  ...

(cloudwatch) support high resolution query