added bookmark panel which uses a 3rd party json blob api to manage json config
added zero clipboard so copy share URL button copies to clipboard
Merge pull request #184 from IIIF/share-workspace

Share workspace
merge master
added annotation fetching for IIIF Manifest
fixes url fetching from multi-image manifests.
small fix so window id stays after changing manifest
added other annotation examples
added URI dependency and updated annotation layer to perform more logic on the manifests to extract annotations. Now working. Also fixed an error which caused windows focusing manifests without annotations to break.