chore: add git mapping config to source control

Author: Chris Alfano

php-config/Git.config.d/codeforphilly.php

@@ -0,0 +1,17 @@
+<?php
+
+Git::$repositories['codeforphilly'] = [
+    'remote' => '[email protected]:CodeForPhilly/codeforphilly.org.git',
+    'originBranch' => 'master',
+    'workingBranch' => 'master',
+    'trees' => [
+        'data-exporters',
+        'event-handlers',
+        'html-templates',
+        'newsletters',
+        'php-classes',
+        'php-config/Git.config.d',
+        'php-config/Laddr.config.d',
+        'site-root'
+    ]
+];