Refactor readers for better di (#457)

* Refactor readers to get a proper DI

Similar to what was done with writers, readers also needed to be updated to match the new way of doing things.
This commits promotes a better DI (factories, injection through constructors).

* Escapers should not be singletons

Instead, they should be proper object that can be injected where needed.

src/Spout/Reader/CSV/Manager/OptionsManager.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Box\Spout\Reader\CSV\Manager;
+
+use Box\Spout\Common\Helper\EncodingHelper;
+use Box\Spout\Common\Manager\OptionsManagerAbstract;
+use Box\Spout\Reader\Common\Entity\Options;
+
+/**
+ * Class OptionsManager
+ * CSV Reader options manager
+ *
+ * @package Box\Spout\Reader\CSV\Manager
+ */
+class OptionsManager extends OptionsManagerAbstract
+{
+    /**
+     * @inheritdoc
+     */
+    protected function getSupportedOptions()
+    {
+        return [
+            Options::SHOULD_FORMAT_DATES,
+            Options::SHOULD_PRESERVE_EMPTY_ROWS,
+            Options::FIELD_DELIMITER,
+            Options::FIELD_ENCLOSURE,
+            Options::ENCODING,
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function setDefaultOptions()
+    {
+        $this->setOption(Options::SHOULD_FORMAT_DATES, false);
+        $this->setOption(Options::SHOULD_PRESERVE_EMPTY_ROWS, false);
+        $this->setOption(Options::FIELD_DELIMITER, ',');
+        $this->setOption(Options::FIELD_ENCLOSURE, '"');
+        $this->setOption(Options::ENCODING, EncodingHelper::ENCODING_UTF8);
+    }
+}