* Add base64ToArrayBuffer to StringUtil
* Remove unnecessary media-util.js import
* Run async requirements in serial rather than parallel
* Update API.getMedia handler to convert ArrayBuffer content to base64
* Rename getImageResolution to getImageDetails
* Change parameter order of getImageDetails
* Pre-process and store media as an ArrayBuffer
* Remove MediaUtil.createBlobFromBase64Content
* Fix Anki media injection
* Rename param for consistency
* Move media loading functionality into DictionaryImporterMediaLoader
* Create test class for media loading
* Remove unnecessary Blob/Image/URL functionality
