Upgrade openseadragon

[jcoyne]

No description provided.

[taylor-steve]

I'm getting an asset error when viewing an OSD item:

Asset `openseadragon/build/openseadragon/images/zoomin_rest.png` was not declared to be precompiled in production.
Declare links to your assets in `app/assets/config/manifest.js`.

  //= link openseadragon/build/openseadragon/images/zoomin_rest.png

[jcoyne]

@taylor-steve I linked the directory in the manifest file. Does that fix it?

[taylor-steve]

@jcoyne yes, that fixes the asset error. Now there's a JS error:

index.js:8  Uncaught ReferenceError: OpenSeadragon is not defined
    at index.js:8:2
    at NodeList.forEach (<anonymous>)
    at NodeList.openseadragon (index.js:8:2)
    at initOpenSeadragon (index.js:8:2)
    at index.js:8:2
    at fn.___hb (index.js:8:2)