added BlockParser dtor

README.md

@@ -66,6 +66,6 @@ make test # or run the executable in ../build/MaddyTests
 
 There are different possibilities:
 
-* Create a GitHub issue
+* [Create a GitHub issue](https://github.com/progsource/maddy/issues/new)
 * Create a pull request with an own branch (don't forget to put yourself in the
   AUTHORS file)

include/maddy/blockparser.h

@@ -45,6 +45,13 @@ public:
     , getBlockParserForLineCallback(getBlockParserForLineCallback)
   {}
 
+  /**
+   * dtor
+   *
+   * @method
+   */
+  virtual ~BlockParser() {}
+
   /**
    * AddLine
    *