* Create graph-panel.md

* Update _index.md

* Create panels-overview.md

* Update graph-panel.md

* Applied Torkel's edits

* Update graph-panel.md

* Update panels-overview.md

* Update _index.md

* Update graph-panel.md

* Create add-a-panel.md

* Update add-a-panel.md

* Update add-a-panel.md

* Revert "Update add-a-panel.md"

This reverts commit 6d51ee8712fda702d7459c1f00307c95d0913dcf.

* Update add-a-panel.md

* Update graph-panel.md