README.md in rtesseract-3.1.2 vs README.md in rtesseract-3.1.3

@@ -4,23 +4,34 @@
     <img src="https://badge.fury.io/rb/rtesseract.png" alt="Gem Version" />
 </a>
 <a href='https://github.com/dannnylo/rtesseract/workflows/CI/badge.svg'>
   <img src="https://github.com/dannnylo/rtesseract/workflows/CI/badge.svg" alt="Build Status" />
 </a>
-<a href='https://coveralls.io/r/dannnylo/rtesseract?branch=master'>
-    <img src="https://coveralls.io/repos/dannnylo/rtesseract/badge.png?branch=master" alt="Coverage Status" />
+<a href='https://app.codacy.com/project/badge/Grade/316a48934db8415d84d2f9a318b0f837'>
+  <img src="https://app.codacy.com/project/badge/Grade/316a48934db8415d84d2f9a318b0f837" alt="Coverage Status" />
 </a>
+<a href='https://app.codacy.com/project/badge/Coverage/316a48934db8415d84d2f9a318b0f837'>
+  <img src="https://app.codacy.com/project/badge/Coverage/316a48934db8415d84d2f9a318b0f837" alt="Coverage" />
+</a>
 <a href='https://codeclimate.com/github/dannnylo/rtesseract'>
     <img src="https://codeclimate.com/github/dannnylo/rtesseract.png" />
 </a>
 
 Ruby library for working with the Tesseract OCR.
 
 ## Installation
 
-Check if tesseract ocr programs is installed:
+Check if tesseract ocr programs are installed:
 
     $ tesseract --version
+
+If not, you can install them with a command like:
+
+    $ apt install tesseract-ocr
+
+or
+
+    $ brew install tesseract
 
 Add this line to your application's Gemfile:
 
 ```ruby
 gem 'rtesseract'