Update eztagscloud.php

Moved the $sqlPermissionChecking[from] part of the sql request. It was raising a sql error when using tags on objects with state restriction access.
Fix EZP-22128: Update Copyright info in extension.xml
Fix EZP-22128: Remove ezinfo.php, extension.xml replaced it some years ago
Fix EZP-22128: Update to include additional copyrighters
Merge pull request #70 from jlchassaing/patch-1

Update eztagscloud.php
Use proper joins instead of multiple tables in FROM clause