Introduce an options manager for all writers (#423)

This will improve the management of options and simplify some methods' signatures.
This commit will also help moving the code to a better state regarding Dependency Injection.

tests/Spout/Writer/CSV/WriterTest.php

@@ -204,6 +204,7 @@ class WriterTest extends \PHPUnit_Framework_TestCase
         $this->createGeneratedFolderIfNeeded($fileName);
         $resourcePath = $this->getGeneratedResourcePath($fileName);
 
+        /** @var \Box\Spout\Writer\CSV\Writer $writer */
         $writer = WriterFactory::create(Type::CSV);
         $writer->setFieldDelimiter($fieldDelimiter);
         $writer->setFieldEnclosure($fieldEnclosure);