poche 1.3.1

 * user_agent in file_get_contents
 * poche logo is now in SVG
 * update poche version in compatibility test file
 * create sqlite table tags_entries only if not already exists
 * bug with Flattr (Notice: Trying to get property of non-object)
 * Readability.com changed its export format
 * Change Permissions in pochePictures.php
 * code display when printing a page was buggy
 * encoding in rss
 * error in query to get entries and tags