Update README.md

Author: w4rryn

README.md

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 # WebnovelYoinker
 Downloads and converts webnovels to Epub or PDF
+
+#### Currently supported websites:
+  - wuxiaworld.com (wuxia)
+  - crimsonmagic.me (crimsonmagic)
+
+#### Currently supported export formats:
+  - Epub (epub)
+  
+#### Basic usage:
+Declaring volumes as YAML file:
+
+```yaml
+--- # example-books.yaml
+- Author:   Park Saenal
+  CoverImageURL: https://cdn.wuxiaworld.com/images/covers/og.jpg
+  Language: English
+  Title:    Overgeared Volume 1
+  Year:     2013
+  Website : wuxia
+  ExportFormat : epub
+  ChapterURLs:
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-1
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-2
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-3
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-4
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-5
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-6
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-7
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-8
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-9
+    - https://www.wuxiaworld.com/novel/overgeared/og-chapter-10
+
+- Title:    Konosuba Volume 1
+  Author:   Natsume Akatsuki
+  CoverImageURL:    https://i.imgur.com/eLIkho2.png
+  Language: English
+  Year:     2013
+  Website : crimsonmagic
+  ExportFormat : epub
+  ChapterURLs:
+    - https://www.crimsonmagic.me/archive/gifting-1-p/
+    - https://www.crimsonmagic.me/archive/gifting-1-1/
+    - https://www.crimsonmagic.me/archive/gifting-1-2/
+    - https://www.crimsonmagic.me/archive/gifting-1-3/
+    - https://www.crimsonmagic.me/archive/gifting-1-4/
+    - https://www.crimsonmagic.me/archive/gifting-1-e/
+```
+Downloading declared books:
+```zsh
+Linux:
+goyoinker scrape -in example-books.yaml -out OUTPUT_DIRECTORY -r 3
+```
+The flag -r declares how many books should be downloaded in parallel