feat(mangafreak): add support for MangaFreak

Add chapter and manga extractors for ww2.mangafreak.me with support
for bonus chapters (e.g., 167e suffix).

test/results/mangafreak.py

@@ -0,0 +1,48 @@
+# -*- 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 mangafreak
+
+
+__tests__ = (
+{
+    "#url"     : "https://ww2.mangafreak.me/Read1_Onepunch_Man_1",
+    "#class"   : mangafreak.MangafreakChapterExtractor,
+    "#pattern" : r"https://images\.mangafreak\.me/mangas/onepunch_man/onepunch_man_1/onepunch_man_1_\d+\.jpg",
+    "#count"   : 24,
+
+    "chapter"      : 1,
+    "chapter_minor": "",
+    "chapter_string": "1",
+    "lang"         : "en",
+    "language"     : "English",
+    "manga"        : "Onepunch Man",
+    "manga_slug"   : "Onepunch_Man",
+},
+
+{
+    "#url"     : "https://ww2.mangafreak.me/Read1_Onepunch_Man_167e",
+    "#class"   : mangafreak.MangafreakChapterExtractor,
+
+    "chapter"      : 167,
+    "chapter_minor": "e",
+    "chapter_string": "167e",
+},
+
+{
+    "#url"     : "https://ww2.mangafreak.me/Manga/Onepunch_Man",
+    "#class"   : mangafreak.MangafreakMangaExtractor,
+    "#pattern" : mangafreak.MangafreakChapterExtractor.pattern,
+    "#count"   : range(150, 250),
+
+    "lang"       : "en",
+    "language"   : "English",
+    "manga"      : "Onepunch-Man",
+    "manga_slug" : "Onepunch_Man",
+    "chapter"    : int,
+},
+
+)