Updated README to reflect submission to packagist

Small path fix

README.md

@@ -19,7 +19,7 @@ Installation
 You can install the component in the following ways:
 
 * Use the official Github repository (https://github.com/phpDocumentor/ReflectionDocBlock)
-* Via composer (add the Github Repository as VCS repository in your composer.yml)
+* Via Composer (http://packagist.org/packages/phpdocumentor/reflection-docblock)
 
 Usage
 -----

src/phpDocumentor/Reflection/DocBlock/LongDescription.php

@@ -78,7 +78,7 @@ class LongDescription implements \Reflector
             );
         }
 
-        if (class_exists('\dflydev\markdown\MarkdownExtraParser()')) {
+        if (class_exists('\dflydev\markdown\MarkdownExtraParser')) {
             $md = new \dflydev\markdown\MarkdownExtraParser();
             $result = $md->transformMarkdown($result);
         }

src/phpDocumentor/Reflection/DocBlock/Tag.php

@@ -59,7 +59,7 @@ class Tag implements \Reflector
         $tag_name = str_replace(
             ' ', '', ucwords(str_replace('-', ' ', $matches[1]))
         ).'Tag';
-        $class_name = '\\phpDocumentor\\Reflection\\DocBlock\\Tag\\' . $tag_name;
+        $class_name = 'phpDocumentor\\Reflection\\DocBlock\\Tag\\' . $tag_name;
 
         return (@class_exists($class_name))
             ? new $class_name($matches[1], isset($matches[2]) ? $matches[2] : '')