[ngomik] add replacement for 'subapics'

http://subapics.com/ got discontinued and replaced by http://ngomik.in/.

ngomik.in is still displaying a link to the "old site" showing a big
"Account Suspended" sign.

gallery_dl/extractor/ngomik.py

@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2018 Mike Fährmann
+#
+# 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.
+
+"""Extract manga-chapters and entire manga from http://ngomik.in/"""
+
+from .common import ChapterExtractor
+from .. import text
+
+
+class NgomikChapterExtractor(ChapterExtractor):
+    """Extractor for manga-chapters from ngomik.in"""
+    category = "ngomik"
+    root = "http://ngomik.in"
+    pattern = [r"(?:https?://)?(?:www\.)?ngomik\.in"
+               r"/manga/([^/?&#]+/chapter-[^/?&#]+)"]
+    test = [(("http://ngomik.in/manga/chuuko-demo-koi-ga-shitai"
+              "/chapter-21-5?style=list"), {
+        "url": "e87ed713f31d576013f179b50b4e10d7c678e53a",
+        "keyword": "a774caea148fc18a7d889f453dadbe3def9e0c2c",
+    })]
+
+    def __init__(self, match):
+        url = "{}/manga/{}?style=list".format(self.root, match.group(1))
+        ChapterExtractor.__init__(self, url)
+
+    def get_metadata(self, page):
+        info = text.extract(page, '<title>', "</title>")[0]
+        manga, chapter, _ = info.split(" - ")
+        chapter, sep, minor = chapter.rpartition(" ")[2].partition(".")
+
+        return {
+            "manga": text.unescape(manga),
+            "chapter": text.parse_int(chapter),
+            "chapter_minor": sep + minor,
+            "lang": "id",
+            "language": "Indonesian",
+        }
+
+    @staticmethod
+    def get_images(page):
+        readerarea = text.extract(
+            page, '<div class="page-break">', '<div class="select-view">')[0]
+        return [
+            (url, None)
+            for url in text.extract_iter(
+                readerarea, ' src="', '"'
+            )
+        ]