added coveralls, updated grunt and grunt-cli to valid version
merge master
added annotation fetching for IIIF Manifest
fixes url fetching from multi-image manifests.
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.
fixed merge conflict with master
Merge pull request #193 from IIIF/annotations-backend-infrastructure#180

Annotations backend infrastructure#180