feat(templating): refactoring template variable handling for variables that change on time refresh, closes #5021

Added moment.js locales. Set locale from window.navigator at app init(). Use firstDayOfWeek on time picker

grammar fix in docs

(snapshot) save original url

The data is exported in the same exact format as presented in the table panel.
This is achieved by using the same renderer as the UI uses.

[prometheus] Use `panelId` and `target.refId` for requestId

Using these two values ties requests to a
particular query position within a panel, ensuring
that requests are canceled if:

- Duplicate requests with the same query are sent
- Requests from the same query position (but a
different query) are sent

The last point is important as it identifies
queries by a physical location in the dashboard
instead of with the query expression.  If a
different query from the same position in a panel
is sent, the previous request should be canceled.

Update debian.md to Debian Jessie

(cloudwatch) add metrics

properly quote font-family on singlestat