[rule34vault] Added initial support for rule34vault.com

- Added playlists support for rule34vault
- Added support for posts in rule34vault
- Fixed supported sites with script
- Fixed posts pattern in rule34vault
- Added tests for rule34vault
- Clean
- Fixed lint warnings

test/results/rule34vault.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+from gallery_dl.extractor import rule34vault
+
+
+__tests__ = (
+    {
+        "#url"     : "https://rule34vault.com/sfw",
+        "#category": ("booru", "rule34vault", "tag"),
+        "#class"   : rule34vault.Rule34vaultTagExtractor,
+        "#pattern" : r"https://r34xyz\.b-cdn\.net/posts/\d+/\d+/\d+\.(jpg|mp4)",
+        "#count"   : 10,
+    },
+    {
+        "#url"     : "https://rule34vault.com/post/486545",
+        "#category": ("booru", "rule34vault", "post"),
+        "#class"   : rule34vault.Rule34vaultPostExtractor,
+        "#pattern"     : r"https://r34xyz\.b-cdn.net/posts/486/486545/486545\.jpg",
+        "#sha1_content": "8f53c4c9d049842d23b51fb3cf8ce11bcbe21f07",
+    },
+    {
+        "#url"     : "https://rule34vault.com/post/382937",
+        "#category": ("booru", "rule34vault", "post"),
+        "#class"   : rule34vault.Rule34vaultPostExtractor,
+        "#pattern"     : r"https://r34xyz\.b-cdn.net/posts/382/382937/382937\.mp4",
+        "#sha1_content": "b962e3e2304139767c3792508353e6e83a85a2af",
+    },
+    {
+        "#url"     : "https://rule34vault.com/playlists/view/20164",
+        "#category": ("booru", "rule34vault", "playlist"),
+        "#class"   : rule34vault.Rule34vaultPlaylistExtractor,
+        "#pattern" : r"https://r34xyz\.b-cdn\.net/posts/\d+/\d+/\d+\.(jpg|mp4)",
+    },
+)