Add CN_IMAGE_DIR_NAME const.
Remove unnecessary manage form actions for metaboxes.
Fix gettext domains.
Introduce cnUpload,
Add cnUpload::upload().

Add subdir param support.
Use constant for folder name rather than being hard coded.
Migrate core image/logo processing to cnImage.

Eliminate the use of Timthumb and class.upload.php from core.
Update image settings with better descriptions.

Add the 'fit' option.
A couple admin image CSS tweaks.
Move class.upload.php to the vendor sub-folder.
Delete class.upload.php lang files. No needed.
Update path to class.upload.php.