When linkSrv appends parameters to a URL's query string, it would blindly
add a ? to the URL even if the URL already contained a ? or the string
to add was empty. This change fixes that behavior and some other edge cases.

Includes a unit test to verify expected behavior.

docs(): Fix changelog link in whats-new-in-v2-1

I noticed a typo when I was reviewing the docs ...

fix(build): minor fix for build script to make latest copy for rpm when version is pre release version

fix(panel): fix for firefox and placing cursor in text inputs when in panel fullscreen edit mode, fixes #2957

The quotes turn the value into a title attribute rather than href attribute,
thus on http://docs.grafana.org/guides/whats-new-in-v2-1/ this link was
rendered as <a href title="https://github.com/...">CHANGELOG.md</a>
which when clicked goes back to itself (not to GitHub).

fix(share): fixed share panel image url, did not generate correct url when domain name contained word dashboards, fixes #2916

fix(influxdb): influxdb data source did not use right http abstraction for metric queries, fixes #2919

Fixed configuration example for Github OAuth team_ids.

Removed spurious `</div>`, fixes Edge on Windows

fix(timepicker): fixed issue with timepicker and auto refresh and entering manual time when timepicker dropdown is open, fixes #2897

Fix missing downsampling name in kairos plugin

Conflicts:
	pkg/models/datasource.go
	public/app/plugins/datasource/prometheus/datasource.js
	public/app/plugins/datasource/prometheus/partials/query.editor.html
	public/app/plugins/datasource/prometheus/queryCtrl.js

small docs structure change, moved build from source into install section and CLA into project, and about into project

fix prometheus time conversion