Merge pull request #283 from kp52/develop

Correct logic for table prefix check in advanced install
Remove buggy JS from ManagerManager for IE6/7 (unsupported)
Merge branch 'develop' of github.com:ClipperCMS/ClipperCMS into develop
bkmanager.static.php and sysinfo.static.php to share same db table code. See also #282.
DbInfo class
Renamed db_info.inc.php -> db_info.class.inc.php for consistency with other include files
Added (reinstated?) Database Tables heading to sysinfo.static.php
Moved Database Tables heading to  db_info.class.inc.php
fix @SELECT not working #285
Merge pull request #286 from Cipa/develop

fix @SELECT not working #285