Composer and PHPCS added

A composer package descriptor has been added, along with a PHPunit descriptor and code sniffer ruleset.

.gitignore

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+composer.lock
+/vendor/
+.idea

composer.json

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+{
+  "name": "stklcode/statify-blacklist",
+  "description": "A blacklist extension for the famous Statify WordPress plugin",
+  "keywords": [
+    "wordpress",
+    "plugin",
+    "statistics",
+    "blacklist"
+  ],
+  "license": "GPL-2.0+",
+  "authors": [
+    {
+      "name": "Stefan Kalscheuer",
+      "email": "stefan@stklcode.de",
+      "homepage": "https://www.stklcode.de"
+    }
+  ],
+  "type": "wordpress-plugin",
+  "require": {
+    "php": ">=5.5",
+    "composer/installers": "~1.0"
+  },
+  "require-dev": {
+    "php": ">=5.5",
+    "phpunit/phpunit": "*",
+    "wp-coding-standards/wpcs": "~0.6.0"
+  }
+}

phpunit.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<phpunit bootstrap="./vendor/autoload.php">
+	<testsuites>
+		<testsuite name="Statify Blacklist TestSuite">
+			<directory>./test</directory>
+		</testsuite>
+	</testsuites>
+
+</phpunit>

ruleset.xml

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+<?xml version="1.0"?>
+<ruleset name="StatifyBlacklist">
+	<description>Derived from WordPress</description>
+	<rule ref="WordPress">
+		<!-- Type hint checks mess up PHP 7 checks, while this plugin has compatibility level 5.5 and above. -->
+		<exclude name="Squiz.Commenting.FunctionComment.ScalarTypeHintMissing"/>
+
+		<!-- The plugin uses switch_to_blog for multisite handling. -->
+		<exclude name="WordPress.VIP.RestrictedFunctions.switch_to_blog"/>
+
+		<!-- Direct queries used to clean up statify table. -->
+		<exclude name="WordPress.VIP.DirectDatabaseQuery.DirectQuery"/>
+		<exclude name="WordPress.VIP.DirectDatabaseQuery.NoCaching"/>
+	</rule>
+</ruleset>