Refactorings

- important curl and wget improvements
- initial test coverage
- setters and getters in Request classes
- namespace fixes
- some additions in README
- docblocks and code-style

src/Converters/Wget/WgetConverter.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PmConverter\Converters\Wget;
+
+use PmConverter\Converters\{
+    Abstract\AbstractConverter,
+    ConverterContract};
+
+class WgetConverter extends AbstractConverter implements ConverterContract
+{
+    protected const FILE_EXT = 'sh';
+
+    protected const OUTPUT_DIR = 'wget';
+
+    protected const REQUEST_CLASS = WgetRequest::class;
+}