Usage and Installation information added to Readme.md

.php_cs.dist

@@ -1,5 +1,6 @@
 <?php
 
+use Mollie\PhpCodingStandards\PhpCsFixer\Rules;
 use PhpCsFixer\Config;
 use PhpCsFixer\Finder;
 

README.md

@@ -1,3 +1,92 @@
 # Mollie PHP Coding Standards
-
 Contains PHP coding standards like rules for PHP-CS-Fixer that serves for purpose of standardization.
+
+## Usage
+This package makes use of PHP-CS-Fixer.
+
+### Already familiar with PHP-CS-Fixer
+
+This package provides default rules to be used with PHP-CS-Fixer.
+
+You can find them in `Mollie\PhpCodingStandards\PhpCsFixer\Rules` which has methods specific to php version,
+which you can directly use in the `->setRules()` part of your config. For example, assuming PHP version 7.3:
+
+```php
+use Mollie\PhpCodingStandards\PhpCsFixer\Rules;
+
+$config->setRules(Rules::getForPhp73());
+``` 
+
+### New to PHP-CS-Fixer
+
+Place a file named `.php_cs.dist` that has following content in your project's root directory.
+
+```php
+use Mollie\PhpCodingStandards\PhpCsFixer\Rules;
+use PhpCsFixer\Config;
+use PhpCsFixer\Finder;
+
+$finder = Finder::create()
+    ->name('.php_cs.dist') // Fix this file as well
+    ->in(__DIR__);
+
+return Config::create()
+    ->setFinder($finder)
+    ->setRiskyAllowed(true)
+    // use specific rules for your php version e.g.: getForPhp71, getForPhp72, getForPhp73
+    ->setRules(Rules::getForPhp71());
+```
+
+### Manual Triggering
+Run following command in your project directory, that will run fixer for every `.php` file.
+```bash
+vendor/bin/php-cs-fixer fix
+```
+
+### Use via PhpStorm file watcher
+Please follow [official PhpStorm documentation](https://www.jetbrains.com/help/phpstorm/using-php-cs-fixer.html#f21a70ca)
+
+### Use via pre-commit git hook
+Place a file with the content of the following bash script into `.git/hooks` directory called pre-commit and make it executable 
+you can find more details about git hooks on [official git manual](https://git-scm.com/book/en/v2/Customizing-Git-Git-Hooks). 
+
+```bash
+#!/usr/bin/env bash
+
+EXCLUDE_DIRECTORIES_REGEX='^(directory_one/(sub_directory_one|sub_directory_two)|directory_two)/.*'
+git diff --diff-filter=ACMRTUXB --name-only --staged | grep -E '\.php(_cs\.dist)?$' | grep -vE $EXCLUDE_DIRECTORIES_REGEX |  while read FILE; do
+    STATUS="$(git status --porcelain ${FILE} | cut -c 1-2)"
+    vendor/bin/php-cs-fixer fix --using-cache=no --quiet --dry-run ${FILE}
+
+    # Not 0 means php-cs-fixer either errored or wanted to make changes
+    if [ $? != 0 ]
+    then
+        # MM = staged & non-staged modification in same file
+        if [ ${STATUS} = "MM" ]
+        then
+            echo -e "\033[31m┌────────────────────────────────────────────────────────────────────────────────┐"
+            echo -e "│ Failure:\033[39m Codestyle violation(s) in file with both staged and unstaged changes. \033[31m│"
+            echo -e "├────────────────────────────────────────────────────────────────────────────────┘"
+            echo -e "└\033[33m File:\033[39m    $FILE"
+            exit 1
+        fi
+
+        vendor/bin/php-cs-fixer fix --using-cache=no --quiet ${FILE}
+        git add ${FILE}
+    fi
+done
+```
+
+## Installation
+```bash
+composer require --dev  mollie/php-coding-standards
+```
+
+## Working at Mollie
+Mollie is always looking for new talent to join our teams. We’re looking for inquisitive minds with good ideas and
+strong opinions, and, most importantly, who know how to ship great products. Want to join the future of payments? 
+[Check out our vacancies](https://jobs.mollie.com).
+
+## License
+[BSD (Berkeley Software Distribution) License](https://opensource.org/licenses/bsd-license.php).
+Copyright (c) 2013-2019, Mollie B.V.

composer.json

@@ -16,9 +16,7 @@
     },
     "minimum-stability": "stable",
     "require": {
-        "php": "^7.1.3"
-    },
-    "require-dev": {
+        "php": "^7.1.3",
         "friendsofphp/php-cs-fixer": "^2.15"
     },
     "bin": [

src/PhpCsFixer/Rules.php

@@ -14,7 +14,7 @@ public static function getForPhp71(array $overriddenRules = []): array
         return array_merge(self::getBaseRules(), $overriddenRules);
     }
 
-    public static function getForPhp72(array $overriddenRules = []) : array
+    public static function getForPhp72(array $overriddenRules = []): array
     {
         $specific72Rules = [
             // At the moment there are no specific 7.2 rules or configurations
@@ -23,7 +23,7 @@ public static function getForPhp72(array $overriddenRules = []) : array
         return array_merge(self::getForPhp71($specific72Rules), $overriddenRules);
     }
 
-    public static function getForPhp73(array $overriddenRules = []) : array
+    public static function getForPhp73(array $overriddenRules = []): array
     {
         $specific73Rules = [
             'heredoc_indentation'   => true,