feat(instrumentation): added meter, histogram and new timer, timer now send p25, p75, p90, p99 percentiles in 1000 sample exp decaying sample

Fix wording of the dashboard tags popover text

Fixed assets urls in 500.html

closes #5211

Add metrics for AWS/ElasticBeanstalk

package.json: Upgrade grunt-contrib-compress, Fixes #5071

* Fix parsing of intervals. defined in ms

Fix parsing of intervals. defined in ms.
Increase accuracy for sub-second inrevals.
Closes #5008

* Tests for sub-ms intervals

Unit test for https://github.com/grafana/grafana/commit/2034d4b9710b0cb9fd0cdf14aa9981cd0417eda4

Fixed type

This updates the mkdocs.yml source file such that the HTTP Preferences
API is included in the website navigation bar and in the HTTP API
overview page.

This commit also refreshes the docs/README.md file with more verbose
instructions for building and viewing the documentation locally.

* Original issue: #5069 Document org & user preferences HTTP docs
* Original PR: #5087

Closes #5193

Conflicts:
	public/app/features/templating/templateValuesSrv.js

fix(templating): fixed issue with  value being shown instead of it's text representation, fixes #5172

Authorization header to X-DS-Authorization in backend_srv.js