Add default PHPUnit configuration

.gitignore

@@ -5,3 +5,4 @@ composer.phar
 composer.lock
 /vendor/
 php.ini
+phpunit.xml

phpunit.xml.dist

+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.3/phpunit.xsd"
+         backupGlobals="false"
+         backupStaticAttributes="false"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         stopOnFailure="false"
+         syntaxCheck="false"
+         bootstrap="vendor/autoload.php"
+>
+
+    <php>
+        <ini name="error_reporting" value="-1"/>
+    </php>
+
+    <testsuites>
+        <testsuite name="MongoDB CRUD Test Suite">
+            <directory>./tests/</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>