simple fix
====
   
added index _visit server_date
added index _log_link_action idvisit

plugins easy to register a new hook

PPT= TRY PIWIK instead of onlin demo + screenshot piiwk

error RSS Feed only used on DataTable_Array http://piwik.org/demo/?module=API&method=Referers.getKeywords&idSite=1&period=week&date=yesterday&format=rss&filter_limit=30&filter_sort_column=3 
NOT CLEAR MESSAGE

documenter 	const VISIT_STANDARD_LENGTH = 1800; when writing plugin and need to test stats log

CHANGES DONE TO LIBRARIES
=========================
- edited zend_log and changed attr to protected
- fixed bug fwrite in zend_log stream writer
- fixed PEAR so that it works under PHP5 with STRICT MODE enabled
- edited line 145 registry.php from require_once 'Zend/Exception.php'; to require_once 'Exception.php';