ClimbSheet - Chrome extension (version 1.18.3)
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INSTALL - this exact folder is the one Chrome wants
  1. Open Chrome:  chrome://extensions
  2. Turn ON "Developer mode" (top-right).
  3. Click "Load unpacked" (top-left).
  4. Select THIS folder - the one containing manifest.json, app.html, popup.html.
  5. The tile should read version 1.18.3.

"Manifest file is missing or unreadable" means you picked a folder that does not
contain manifest.json - go one level down until you can see it.

store-assets holds the screenshots and documents; it stays outside the extension's
manifest scope, and no name here may begin with an underscore (Chrome refuses to load those)
used for publishing, not code.
