Change behaviour of @param parsing

In issue report phpDocumentor/phpDocumentor2#620 @bobef reported that when he
used just a Type as content of the @param that it would be recognized as
description instead of the Type.

According to the unit tests this is correct behaviour but after reviewing the
pattern of the output his version is more consistent. As such I have altered
the behaviour to act as following:

If only one word is found after an @param (word means white-space bounded
series of characters) then interpret that as the type and not description.

During this item several issues in unit tests were fixed and a new 'Type'
Collection was introduced that is capable of expanding types based on a given
namespace and series of aliases.
This should be re-used in phpDocumentor's Transformer as a duplication exists
there with the expanding of the Types.

Please note: the suggested format by @bobef is not valid according to the
PHPDoc Standard but is provided for convenience.

tests/phpDocumentor/Reflection/DocBlockTest.php

@@ -10,10 +10,6 @@
 
 namespace phpDocumentor\Reflection;
 
-require_once __DIR__.'/../../../src/phpDocumentor/Reflection/DocBlock.php';
-require_once __DIR__
-    .'/../../../src/phpDocumentor/Reflection/DocBlock/LongDescription.php';
-
 /**
  * Test class for phpDocumentor_Reflection_DocBlock
  *