Fix error due to changed PHPParser API

PHP Fatal error:  Cannot use object of type PHPParser_Comment_Doc as
array in
C:\www\cw4\vendor\doctrine\annotations\lib\Doctrine\Common\Annotations\DocParser.php
on line 351
Fixed the other extractors, they were also using the PHPParser_Comment_Doc directly, instead of calling getText() on them.
Oops, debug code.
- Added some checks before calling ->getText in some instances, null's could be returned there which caused errors.
Merge pull request #207 from vansante/master

Fix error due to changed PHPParser API