[TASK] Clean up phpDoc comments in typo3/sysext/

Clean up phpDoc comments for the following classes:

* typo3/sysext/cms/tslib/content/class.tslib_content_abstract.php
* typo3/sysext/cms/tslib/content/class.tslib_content_case.php
* typo3/sysext/cms/tslib/content/class.tslib_content_cleargif.php
* typo3/sysext/cms/tslib/content/class.tslib_content_columns.php
* typo3/sysext/cms/tslib/content/class.tslib_content_content.php
* typo3/sysext/cms/tslib/content/
	class.tslib_content_contentobjectarray.php
* typo3/sysext/cms/tslib/content/
	class.tslib_content_contentobjectarrayinternal.php
* typo3/sysext/cms/tslib/content/class.tslib_content_contenttable.php
* typo3/sysext/cms/tslib/content/class.tslib_content_editpanel.php
* typo3/sysext/cms/tslib/content/class.tslib_content_file.php
* typo3/sysext/cms/tslib/content/class.tslib_content_files.php
* typo3/sysext/cms/tslib/content/class.tslib_content_flowplayer.php
* typo3/sysext/cms/tslib/content/class.tslib_content_fluidtemplate.php
* typo3/sysext/cms/tslib/content/class.tslib_content_form.php
* typo3/sysext/cms/tslib/content/class.tslib_content_hierarchicalmenu.php
* typo3/sysext/cms/tslib/content/class.tslib_content_horizontalruler.php
* typo3/sysext/cms/tslib/content/class.tslib_content_image.php
* typo3/sysext/cms/tslib/content/class.tslib_content_imageresource.php

Clean up provides:

* Provide correct parameter names in phpDoc
* Provide correct data types in phpDoc
* CGLify phpDoc (remove tabs)

Change-Id: I2a6c88091a5f45c9a8a765e2ef6b43e562a83145
Resolves: #38058
Releases: 6.0
Reviewed-on: http://review.typo3.org/12072
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn