add PSR formatting & syntax tests

Author: notslang

.travis.yml

@@ -0,0 +1,6 @@
+language: php
+php:
+  - '5.6'
+  - nightly
+install: composer install
+script: composer test

composer.json

@@ -7,5 +7,11 @@
   "keywords": ["plugin","wordpress","wp-sync-db","media"],
   "require": {
     "composer/installers": "~1.0.6"
+  },
+  "require-dev": {
+    "phpfmt/fmt": "^19.6"
+  },
+  "scripts": {
+    "test": "./test.sh"
   }
 }

test.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+set -e
+set -o pipefail
+
+files=(*.php class/*.php template/*.php);
+for file in "${files[@]}"
+do
+  php -l "$file";
+  php vendor/phpfmt/fmt/fmt.phar --psr1 --psr2 -o=- "$file" | diff -U3 \
+  --label "$file (correct formatting)" --label "$file (original)" - "$file";
+done