Merge pull request #746 from jeffski/decide-content

Determine file type based on content, not extension

src/QtImageReader.cpp

@@ -67,6 +67,7 @@ void QtImageReader::Open()
             image = std::make_shared<QImage>();
             QImageReader imgReader( path );
             imgReader.setAutoTransform( true );
+            imgReader.setDecideFormatFromContent( true );
             loaded = imgReader.read(image.get());
         }