correct check if tag exists for current component

also add whitespace between tags in template
remove tests that got removed in 3.8
fix connection: typo in retry variable
remove another ext4 dependent test

properly done without ext4 dependency in 3.8
fix unneded code
overview of written articles for every author

also show count of all written by author and possibility to export articles list as csv/xls
fix typo
only output image if there is one

adds missing part from c05a5fc9592314dc6330b93212b2e204460b83af
Use trlKwfStatic for Acl
Use CURDATE instead of NOW if sql comparing with DATE-column

MySQL changed logic how to compare a DATE-column with NOW() from 5.0 to 5.1
It's recommended to compare DATE-column with CURDATE() instead of NOW() to
be uneffected by this change. This is a problem with our production-online
version of MySQL and our local work-environment.
See http://bugs.mysql.com/bug.php?id=28929 for more information.
search for parent site only with parent_id because this is always set

search with id return old parent page, very bad
_getParentPage function for filename filter

is necessary to override it in trl because there is no parent_id