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diff --git a/vendor/doctrine/cache/lib/Doctrine/Common/Cache/MongoDBCache.php b/vendor/doctrine/cache/lib/Doctrine/Common/Cache/MongoDBCache.php
new file mode 100644
index 000000000..75fe0ca11
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+++ b/vendor/doctrine/cache/lib/Doctrine/Common/Cache/MongoDBCache.php
@@ -0,0 +1,197 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\Common\Cache;
+
+use MongoBinData;
+use MongoCollection;
+use MongoCursorException;
+use MongoDate;
+
+/**
+ * MongoDB cache provider.
+ *
+ * @since  1.1
+ * @author Jeremy Mikola <jmikola@gmail.com>
+ */
+class MongoDBCache extends CacheProvider
+{
+    /**
+     * The data field will store the serialized PHP value.
+     */
+    const DATA_FIELD = 'd';
+
+    /**
+     * The expiration field will store a MongoDate value indicating when the
+     * cache entry should expire.
+     *
+     * With MongoDB 2.2+, entries can be automatically deleted by MongoDB by
+     * indexing this field with the "expireAfterSeconds" option equal to zero.
+     * This will direct MongoDB to regularly query for and delete any entries
+     * whose date is older than the current time. Entries without a date value
+     * in this field will be ignored.
+     *
+     * The cache provider will also check dates on its own, in case expired
+     * entries are fetched before MongoDB's TTLMonitor pass can expire them.
+     *
+     * @see http://docs.mongodb.org/manual/tutorial/expire-data/
+     */
+    const EXPIRATION_FIELD = 'e';
+
+    /**
+     * @var MongoCollection
+     */
+    private $collection;
+
+    /**
+     * Constructor.
+     *
+     * This provider will default to the write concern and read preference
+     * options set on the MongoCollection instance (or inherited from MongoDB or
+     * MongoClient). Using an unacknowledged write concern (< 1) may make the
+     * return values of delete() and save() unreliable. Reading from secondaries
+     * may make contain() and fetch() unreliable.
+     *
+     * @see http://www.php.net/manual/en/mongo.readpreferences.php
+     * @see http://www.php.net/manual/en/mongo.writeconcerns.php
+     * @param MongoCollection $collection
+     */
+    public function __construct(MongoCollection $collection)
+    {
+        $this->collection = $collection;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doFetch($id)
+    {
+        $document = $this->collection->findOne(array('_id' => $id), array(self::DATA_FIELD, self::EXPIRATION_FIELD));
+
+        if ($document === null) {
+            return false;
+        }
+
+        if ($this->isExpired($document)) {
+            $this->doDelete($id);
+            return false;
+        }
+
+        return unserialize($document[self::DATA_FIELD]->bin);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doContains($id)
+    {
+        $document = $this->collection->findOne(array('_id' => $id), array(self::EXPIRATION_FIELD));
+
+        if ($document === null) {
+            return false;
+        }
+
+        if ($this->isExpired($document)) {
+            $this->doDelete($id);
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doSave($id, $data, $lifeTime = 0)
+    {
+        try {
+            $result = $this->collection->update(
+                array('_id' => $id),
+                array('$set' => array(
+                    self::EXPIRATION_FIELD => ($lifeTime > 0 ? new MongoDate(time() + $lifeTime) : null),
+                    self::DATA_FIELD => new MongoBinData(serialize($data), MongoBinData::BYTE_ARRAY),
+                )),
+                array('upsert' => true, 'multiple' => false)
+            );
+        } catch (MongoCursorException $e) {
+            return false;
+        }
+
+        return isset($result['ok']) ? $result['ok'] == 1 : true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doDelete($id)
+    {
+        $result = $this->collection->remove(array('_id' => $id));
+
+        return isset($result['ok']) ? $result['ok'] == 1 : true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doFlush()
+    {
+        // Use remove() in lieu of drop() to maintain any collection indexes
+        $result = $this->collection->remove();
+
+        return isset($result['ok']) ? $result['ok'] == 1 : true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doGetStats()
+    {
+        $serverStatus = $this->collection->db->command(array(
+            'serverStatus' => 1,
+            'locks' => 0,
+            'metrics' => 0,
+            'recordStats' => 0,
+            'repl' => 0,
+        ));
+
+        $collStats = $this->collection->db->command(array('collStats' => 1));
+
+        return array(
+            Cache::STATS_HITS => null,
+            Cache::STATS_MISSES => null,
+            Cache::STATS_UPTIME => (isset($serverStatus['uptime']) ? (int) $serverStatus['uptime'] : null),
+            Cache::STATS_MEMORY_USAGE => (isset($collStats['size']) ? (int) $collStats['size'] : null),
+            Cache::STATS_MEMORY_AVAILABLE  => null,
+        );
+    }
+
+    /**
+     * Check if the document is expired.
+     *
+     * @param array $document
+     *
+     * @return bool
+     */
+    private function isExpired(array $document)
+    {
+        return isset($document[self::EXPIRATION_FIELD]) &&
+            $document[self::EXPIRATION_FIELD] instanceof MongoDate &&
+            $document[self::EXPIRATION_FIELD]->sec < time();
+    }
+}