Pre-release of version 1.9.12

Redundancy 1.9.12 Changelog (pre release)
============================
Bugfixes
=====
- Fixed a bug causing an internal warning
- Fixed a bug (#31) which caused wrong display of the transparency
channel of a PNG file
- Changed a wrong table at the health module in the admin panel
Feature additions/ Improvements
======================
- The changes page now display's the kind of the entry (changed or new
entry)
- Added a guard module to check filesystem operations before they get
executed
- Added a new Upload feedback module. Will be used if
Program_Upload_Redirect set to 0

- Important! A new column was updated in the database Table 'Files'. If
you want to upgrade, you have to create this column. You can use the
needed datatype from Installer/database.sql.