Stream video with GridStoreAdapter (implements byte-range requests) (#2437)

* Stream video with GridStoreAdapter

* fixing nits. Removing test(Range not accepted as header)

* nit

* Changed names. Added function to check if stream-requirements is fulfilled.

src/Controllers/FilesController.js

@@ -82,6 +82,10 @@ export class FilesController extends AdaptableController {
   expectedAdapterType() {
     return FilesAdapter;
   }
+
+  getFileStream(config, filename) {
+    return this.adapter.getFileStream(filename);
+   }
 }
 
 export default FilesController;