- Added while/endwhile and do/while syntaxes

- Fix the abstractclass requirement of parse() function

src/ControlStructure/ControlStructure.php

@@ -3,5 +3,5 @@
 namespace Picea\ControlStructure;
 
 interface ControlStructure {
-    public function parse(\Picae\Compiler\Context &$context, string $sourceCode, string $token);
+    public function parse(\Picea\Compiler\Context &$context, string $sourceCode, string $token);
 }