Minor style improvements
Merge branch 'master' of github.com:WoltLab/com.woltlab.wcf.attachment

Conflicts:
	templates/attachments.tpl
Adds property documentation
Fixes use statements
Added permission handling
Merge branch 'master' of github.com:WoltLab/com.woltlab.wcf.attachment

Conflicts:
	files/lib/data/attachment/Attachment.class.php
Fixed display of images without a thumbnail version
Using filesize optiontype
Fixed default values
Fixing installation of userGroupOption
Merge pull request #16 from MeinAccount/bug/userGroupOption

Fixing installation of userGroupOptions
Removes obsolete code
Removed obsolete code
Merge branch 'master' of github.com:WoltLab/com.woltlab.wcf.attachment
Major icon overhaul
Added ability to embed attachments
Added support for maxUploads validation
Implemented Internet Explorer fallback for file uploads
Use correct multiplication sign
Use short ternary