navigation for "Data Depot", a la DesignSafe

[wesleyboar]

• Moved "Setting Path to DS on Corral" to "Transferring Your Data".
  ^{refactor: move "settingpath…" to "datatransfer" #176}
• Renamed "Data Management Plan Template" to "Sample Data Management Plan".
  ^{refactor: rename "DMP Template" to "DMP Guide" #178}
• Moved "Curating Data in Experimental Facilities" to "Resources for Users".
  ^{refactor: move "… Exp. Facilities" to "Resources …" #180}
• Moved "Data Management Plan (DMP) Guide" to "Resources for Users".
  ^{refactor: move "DMP Guide" to "Resources" #181}
• Deleted "Managing Data": "Overview" (only page left in "Managing Data").
  ¹⁸⁴

Note

This moves "Managing Data" content to other locations.

Part of #175.