Add support for playlist based on tags

New icon font

test(playlist): add test for playlist sqlstoretest(playlist): add test for playlist sqlstoretest(playlist): add test for playlist sqlstoretest(playlist): add test for playlist sqlstoretest(playlist): add test for playlist sqlstoretest(playlist): add test for playlist sqlstoretest(playlist): add test for playlist sqlstoretest(playlist): add test for playlist sqlstoretest(playlist): add test for playlist sqlstore

No added trailing slash if proxypath is empty in JoinUrlFragments

The JoinUrlFragments function adds a trailing slash if to the proxy url
if the proxy path is an empty string. This fix removes that trailing
slash. Fixes #3847

Update CHANGELOG.md

Minor grammar tweaks and formatting.

fix sql query in GetAdminStats.

fixes #3879

Send OpenTSDB POST request as urlencoded

Update CHANGELOG.md

Fixed dashboard_tag query

Triggers grafana packer CircleCI build after successful build of master branch

Only triggers for main grafana repo (not forks) and when the
master branch is built.

Grafana stats view as mentioned in #3812

fix(graph): narrow panels shows correct date format on x-axis