Adding php codesniffer and config

Author: jamesmills

Diff for: .php_cs

@@ -0,0 +1,20 @@
+<?php
+
+$finder = PhpCsFixer\Finder::create()
+    ->in(__DIR__ . '/app')
+    ->in(__DIR__ . '/database/migrations')
+;
+
+return PhpCsFixer\Config::create()
+    ->setUsingCache(false)
+    ->setRules([
+        '@PSR2' => true,
+        'concat_space' => ['spacing' => 'one'],
+        'cast_spaces' => ['space' => 'single'],
+        'no_unused_imports' => true,
+        'blank_line_before_statement' => true,
+        'trailing_comma_in_multiline_array' => true,
+        'single_quote' => true
+    ])
+    ->setFinder($finder)
+;

Diff for: Makefile

@@ -0,0 +1,12 @@
+THIS := $(realpath $(lastword $(MAKEFILE_LIST)))
+HERE := $(shell dirname $(THIS))
+
+.PHONY: fix lint test
+
+fix:
+	$(HERE)/vendor/bin/php-cs-fixer fix --config=$(HERE)/.php_cs
+
+lint:
+	$(HERE)/vendor/bin/php-cs-fixer fix --config=$(HERE)/.php_cs --dry-run
+
+test: lint