Improved error handling, added fsockopen download support if curl is unavailable
conf() updates when passed false as 3rd parameter now
Added drag and drop re-ordering to filemanager/util/multi-image
Added drag and drop reordering to filemanager/util/multi-file, closes #153
Fixed updating file property after its been set to empty, closes #154
Added preview of images on hover in filemanager
Workaround for click firing on sortable drag due to Firefox bug
Replaced static call with self:: instead of hard-coded class name
Updated breadcrumb to use Link class and multilingual setting
merge master