Added PHP_CS & PHPMD files (#6234)

Added PHP_CS & PHP mess detector file to help with code standardization.

.php_cs.dist

+<?php
+
+ini_set('memory_limit', '1024M');
+
+$finder = PhpCsFixer\Finder::create()
+    ->notPath('bootstrap/cache')
+    ->notPath('storage')
+    ->notPath('vendor')
+    ->notPath('node_modules')
+    ->in(__DIR__)
+    ->name('*.php')
+    ->notName('*.blade.php')
+    ->ignoreDotFiles(true)
+    ->ignoreVCS(true)
+;
+
+return PhpCsFixer\Config::create()
+    ->setRules(array(
+        '@Symfony'                          => true,
+        'class_definition'                  => [
+            'multiLineExtendsEachSingleLine' => true,
+        ],
+        'ordered_class_elements'            => [
+            'use_trait', 'constant_public', 'constant_protected', 'constant_private',
+            'property_public', 'property_protected', 'property_private', 'construct',
+            'destruct', 'magic', 'phpunit', 'method_public', 'method_protected',
+            'method_private'
+        ],
+        'function_declaration'              => ['closure_function_spacing' => 'none'],
+        'binary_operator_spaces'            => ['default' => 'align_single_space_minimal'],
+        'array_syntax'                      => ['syntax' => 'short'],
+        'concat_space'                      => ['spacing' => 'one'],
+        'blank_line_after_namespace'        => true,
+        'linebreak_after_opening_tag'       => true,
+        'not_operator_with_successor_space' => true,
+        'ordered_imports'                   => true,
+        'phpdoc_order'                      => true,
+    ))
+    ->setFinder($finder);

phpmd.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<ruleset name="Laravel and similar phpmd ruleset"
+    xmlns="http://pmd.sf.net/ruleset/1.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
+    xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
+  <description>
+    Inspired by https://github.com/phpmd/phpmd/issues/137
+    using http://phpmd.org/documentation/creating-a-ruleset.html
+  </description>
+  <!-- se importan los rulesets, en este caso todos. -->
+  <rule ref="rulesets/cleancode.xml">
+    <exclude name="StaticAccess"/>
+  </rule>
+  <rule ref="rulesets/codesize.xml/CyclomaticComplexity"/>
+  <rule ref="rulesets/codesize.xml/NPathComplexity"/>
+  <rule ref="rulesets/codesize.xml/ExcessiveMethodLength"/>
+  <rule ref="rulesets/codesize.xml/ExcessiveClassLength"/>
+  <rule ref="rulesets/codesize.xml/ExcessiveParameterList"/>
+  <rule ref="rulesets/codesize.xml/ExcessivePublicCount"/>
+  <rule ref="rulesets/codesize.xml/TooManyFields"/>
+  <rule ref="rulesets/codesize.xml/TooManyMethods">
+      <properties>
+          <property name="maxmethods" value="30"/>
+      </properties>
+  </rule>
+  <rule ref="rulesets/codesize.xml/ExcessiveClassComplexity"/>
+  <rule ref="rulesets/controversial.xml"/>
+  <rule ref="rulesets/design.xml">
+      <exclude name="CouplingBetweenObjects"/>
+  </rule>
+  <!-- beware the façades yo. -->
+  <rule ref="rulesets/design.xml/CouplingBetweenObjects">
+      <properties>
+          <property name="minimum" value="20"/>
+      </properties>
+  </rule>
+  <!-- se importa naming y se excluye ShortVariable para ser ajustada despues. -->
+  <rule ref="rulesets/naming.xml">
+      <exclude name="ShortVariable"/>
+  </rule>
+  <rule ref="rulesets/naming.xml/ShortVariable"
+        since="0.2"
+        message="Avoid variables with short names like {0}. Configured minimum length is {1}."
+        class="PHPMD\Rule\Naming\ShortVariable"
+        externalInfoUrl="http://phpmd.org/rules/naming.html#shortvariable">
+      <priority>3</priority>
+      <properties>
+          <property name="minimum" description="Minimum length for a variable, property or parameter name" value="3"/>
+          <property name="exceptions" value="id,q,w,i,j,v,e,f,fp" />
+      </properties>
+  </rule>
+  <rule ref="rulesets/unusedcode.xml"/>
+</ruleset>
\ No newline at end of file