Update README

Author: battye

README.md

@@ -8,9 +8,10 @@ This extension requires PHP 5.3.3 or above.
 
 ### Installation
 
-Firstly, download the British English (`en`) language pack from phpBB.com as this is the default source language. Then clone this repository:
+Firstly, download the British English (`en`) language pack from phpBB.com as this is the default source language. Then clone this repository and download the dependencies:
 
     git clone https://github.com/phpbb/phpbb-translation-validator.git
+    composer install
 
 For the easiest results, create a directory called `3.2` in the root of the Translation Validator. Upload the `en` language page into this directory, along with the languages you wish to test.
 
@@ -21,7 +22,7 @@ The simplest way to validate is to then run this command (the final argument is
 There are more arguments that can be supplied. For example, suppose you wanted to have your `3.2` directory in a different location, you wanted to explicitly specify phpBB version 3.2, you wanted to run in safe mode and you wanted to see all notices displayed - you would run this command:
 
      php translation.php validate fr 
-        --package-dir=/home/vagrant/phpbb/phpBB/array_parser/3.2 
+        --package-dir=/path/to/your/3.2 
         --phpbb-version=3.2 
         --safe-mode 
         --display-notices