[ocr-credentials] Updated documentation

docs/configuration.md

@@ -1,6 +1,7 @@
 # Parsr Configuration
 
 - [Parsr Configuration](#parsr-configuration)
+
   - [1. Structure](#1-structure)
   - [2. Extractor Config](#2-extractor-config)
     - [2.1. Extractor Tools](#21-extractor-tools)
@@ -11,7 +12,7 @@
     - [4.2. Granularity](#42-granularity)
     - [4.3. Include Marginals](#43-include-marginals)
   - [5. Exempli gratia](#5-exempli-gratia)
-  
+
 To configure the pipeline and choose what modules will be called and with what parameters, you have to provide a JSON file.
 There is only a few required keys:
 
@@ -31,9 +32,10 @@ The cleaner array may appear unconventionnal but is really easy to use. Every it
 
 ```js
 {
-    "version": 0.5,               // Version number of the configuration file format
+    "version": 0.9,               // Version number of the configuration file format
     "extractor": {                // Extraction options (See section 2.)
         "pdf": "extractor-tool",  // Select the tool to extract PDF files
+        // "img": "extractor-tool", Deprecated since 0.9 version
         "ocr": "extractor-tool",  // Select the tool to extract image files (JPG, PNG, TIFF, etc.)
         "language": "lang",       // Select the defaut language of your document. This is used to increase the accuracy of OCR tools (See section 2.2)
         "credentials": {          // Extractors running online services may require credentials to work. (see section 2.3)
@@ -85,6 +87,7 @@ Different extractors are available for each input file format.
   - `google-vision`, which uses the [Google Vision](https://cloud.google.com/vision/) API to detect the contents of an image (see the [google vision documentation for more](../server/src/input/google-vision/README.md)),
   - `ms-cognitive-services`, that uses [Microsoft Cognitive Services](https://azure.microsoft.com/es-es/services/cognitive-services/) OCR to detect and process text inside an image.
   - `amazon-textract`, that uses [Amazon Textract](https://us-east-2.console.aws.amazon.com/textract/home) service to detect and process text inside an image.
+
 ### 2.2. Language
 
 The language parameter is an option that will be pass to Tesseract when using it. It must be in the [Tesseract language format](https://github.com/tesseract-ocr/tesseract/blob/master/doc/tesseract.1.asc#languages), which is an equivalent of [ISO 639-2/T](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes).
@@ -102,7 +105,7 @@ For example, `ms-cognitive-services` extractor requires two values:
 ```
 
 `OCP_APIM_SUBSCRIPTION_KEY` has to be obtained through Azure web console.
-`OCP_APIM_ENDPOINT` is required, but has a default value set. 
+`OCP_APIM_ENDPOINT` is required, but has a default value set.
 
 Default credential values for each module can be found in each `credentials.json` file.
 
@@ -119,7 +122,6 @@ The recommended way to set credentials is to add them to the extractor config:
   },
 ```
 
-
 For more information about input modules and their required credentials, you can check the [Input Modules Documentation](../server/src/input/README.md).
 
 ## 3. Cleaner Config