Featured images v1.5 changes:
Fixed issue where on occasion a featured image would show full size.
Featured images v1.4 changes:
Added height attribute to img tag.
Featured images v1.3 changes:
Improved reporting if attachment is corrupt.
Featured images v1.2 changes:
Added 'Limit wide' and 'Limit narrow' to options page.
Featured images v1.1 changes:
No longer requires a specific image handler. File system operations now using XenForo file functions.