Add basic squizlabs/php_codesniffer configuration

squizlabs/php_codesniffer/3.0/manifest.json

@@ -0,0 +1,9 @@
+{
+    "copy-from-recipe": {
+        "phpcs.xml.dist": "phpcs.xml.dist"
+    },
+    "gitignore": [
+        "/.phpcs-cache",
+        "/phpcs.xml"
+    ]
+}

squizlabs/php_codesniffer/3.0/phpcs.xml.dist

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/squizlabs/php_codesniffer/phpcs.xsd">
+
+    <arg name="basepath" value="."/>
+    <arg name="cache" value=".phpcs-cache"/>
+    <arg name="colors"/>
+    <arg name="extensions" value="php"/>
+
+    <rule ref="PSR2"/>
+
+    <file>bin/</file>
+    <file>config/</file>
+    <file>public/</file>
+    <file>src/</file>
+    <file>tests/</file>
+
+</ruleset>