Update README.md for OCR

README.md

@@ -34,8 +34,9 @@ The configuration can be done in the settings.json and the description is as fol
   "proxy_links":0,   // 0 for disabling proxy when fetching page links upon reaching the limit.
   "proxy_images":0,  // 0 for disabling proxy when fetching  page images upon reaching the limit.
   "max_retry_links":1, // Max retries for fetching a link using proxies.
-  "max_retry_images":1 // Max retries for a fetching a image using proxies.
-  "global_retry_time": // 0 for not running GoBooDo indefinitely, the number of seconds of delay between each global retry otherwise.
+  "max_retry_images":1, // Max retries for a fetching a image using proxies.
+  "global_retry_time":30, // 0 for not running GoBooDo indefinitely, the number of seconds of delay between each global retry otherwise.
+  "lang": "" // "" for create PDF without OCR, languages which OCR reads in. E.g. "eng+ita".
 }
 ~~~
 
@@ -63,8 +64,11 @@ fpdf
 html5lib
 tqdm
 pytesseract
+pypdf2
 ~~~
 
+If you want to use OCR with languages other than English, you should download aditional languages data from [tesseract-ocr](https://github.com/tesseract-ocr).
+
 # Features 
 1. Stateful : GoBooDo keeps a track of the books which are downloaded. In each subsequent iterations of operation only those those links and images are fetched which were not downloaded earlier.
 2. Proxy support : Since Google limits the amount of pages accessible to each individual majorly on the basis of IP address, GoBooDo uses proxies for circumventing that limit and maximizing the number of pages that can be accessed in the preview.