Added CommentBlock handling

Removed HTML fragments.

Author: Martin Brecht-Precht

src/Common/BlockType.php

@@ -7,17 +7,17 @@
  *
  * @package Markdom\Common
  */
-final class BlockType
+class BlockType
 {
 
 	const TYPE_CODE = 'CODE';
+	const TYPE_COMMENT = 'COMMENT';
 	const TYPE_DIVISION = 'DIVISION';
 	const TYPE_HEADING = 'HEADING';
 	const TYPE_UNORDERED_LIST = 'UNORDERED_LIST';
 	const TYPE_ORDERED_LIST = 'ORDERED_LIST';
 	const TYPE_LIST_ITEM = 'LIST_ITEM';
 	const TYPE_PARAGRAPH = 'PARAGRAPH';
 	const TYPE_QUOTE = 'QUOTE';
-	const TYPE_HTML = 'HTML';
 
 }

src/Common/ContentType.php

@@ -7,7 +7,7 @@
  *
  * @package Markdom\Common
  */
-final class ContentType
+class ContentType
 {
 
 	const TYPE_CODE = 'CODE';
@@ -16,6 +16,5 @@ final class ContentType
 	const TYPE_LINE_BREAK = 'LINE_BREAK';
 	const TYPE_LINK = 'LINK';
 	const TYPE_TEXT = 'TEXT';
-	const TYPE_HTML = 'HTML';
 
 }

src/HandlerInterface/HandlerInterface.php

@@ -38,6 +38,12 @@ public function onBlockBegin($type);
 	 */
 	public function onCodeBlock($code, $hint = null);
 
+	/**
+	 * @param $comment
+	 * @return void
+	 */
+	public function onCommentBlock($comment);
+
 	/**
 	 * @return void
 	 */