more tests for manifest parsing

+{
+  "allowCache": true,
+  "mediaSequence": 0,
+  "playlistType": "VOD",
+  "segments": [
+    {
+      "byterange": {
+        "length": 522828,
+        "offset": 0
+      },
+      "duration": 10,
+      "timeRange": {
+        "end": 10,
+        "start": 0
+      },
+      "uri": "hls_450k_video.ts"
+    }
+  ],
+  "targetDuration": 10,
+  "totalDuration": 10
+}

+#EXTM3U
+#EXT-X-TARGETDURATION:10
+#EXT-X-VERSION:4
+#EXT-X-ALLOW-CACHE:0
+#EXT-X-MEDIA-SEQUENCE:0
+#EXT-X-PLAYLIST-TYPE:VOD
+#EXTINF:10,
+#EXT-X-BYTERANGE:522828@0
+hls_450k_video.ts
+#EXT-X-ENDLIST

+{
+  "allowCache": true,
+  "totalDuration": 0,
+  "playlists": [
+   {
+    "attributes": {
+      "PROGRAM-ID": 1,
+    },
+    "uri": "media.m3u8"
+   }, 
+   {
+    "uri": "media1.m3u8"
+   }
+  ]
+}

+# A simple master playlist with multiple variant streams
+#EXTM3U
+#EXT-X-STREAM-INF:PROGRAM-ID=1
+media.m3u8
+#EXT-X-STREAM-INF:
+media1.m3u8

+{
+  "allowCache": true,
+  "mediaSequence": 0,
+  "playlistType": "VOD",
+  "segments": [
+    {
+      "duration": 10,
+      "timeRange": {
+        "end": 10,
+        "start": 0
+      },
+      "uri": "hls_450k_video.ts"
+    },
+  ],
+  "targetDuration": 10,
+  "totalDuration": 10
+}

+#EXTM3U
+#EXT-X-TARGETDURATION:10
+#EXT-X-VERSION:NaN
+#EXT-X-MEDIA-SEQUENCE:0
+#EXT-X-PLAYLIST-TYPE:VOD
+#EXTINF:10,
+hls_450k_video.ts
+#EXT-X-ENDLIST