feat(templating): new template variable selection dropdown now supports accepting custom values that are not an actual selectable value, Fixes #2344

feat(ldap): added support for binding initially with an admin user searching for user and then binding again to authenticate current user, #1450

More work on ldap auth, got memberOf working in the docker ldap test server, playing with config options and structures, #1450

fix(graphite): raw query mode (disable graphite query editor mode) is now persisted property on the query, Fixes #2328, Fixes #2307

Update Singlestat Docs

Need some additional clarification in Spark Line and Value to text before this is merged.

Adding GOPATH

Series override option to hide legend entries

Adds a series override option to hide certain series from the legend.

* public/app/components/timeSeries.js: boolean flag to decide display in
  legend and application of override option for this flag
* public/app/panels/graph/legend.js: exclude hidden series
* public/app/panels/graph/seriesOverridesCtrl.js: add legend override
  option

This fixes #2324

Fixed invalid json example, added missing comma