Add more detail to search results

Adds getSummary to the MediaTypeModel.ts abstract class, which allows individual models to give more detail to better allow people to pick the right result

src/models/MediaTypeModel.ts

@@ -14,6 +14,9 @@ export abstract class MediaTypeModel {
 
 	abstract getMediaType(): MediaType;
 
+	//a string that contains enough info to disambiguate from similar media
+	abstract getSummary(): string;
+
 	abstract getTags(): string[];
 
 	toMetaDataObject(): object {