identify result includes EXIF:Orientation attribute

#15

README.markdown

@@ -61,7 +61,10 @@ The method returns an object similar to:
         format: 'JPEG',
         width: 3904,
         height: 2622,
-        depth: 8
+        depth: 8,
+        exif: {
+            orientation: 0 # 0 if none exists
+        }
     }
 
 ### quantizeColors( options )

src/imagemagick.cc

@@ -300,6 +300,10 @@ Handle<Value> Identify(const Arguments& args) {
     out->Set(String::NewSymbol("depth"), Integer::New(image.depth()));
     out->Set(String::NewSymbol("format"), String::New(image.magick().c_str()));
 
+    Handle<Object> out_exif = Object::New();
+    out_exif->Set(String::NewSymbol("orientation"), Integer::New(atoi(image.attribute("EXIF:Orientation").c_str())));
+    out->Set(String::NewSymbol("exif"), out_exif);
+
     return scope.Close( out );
 }
 

test/test.js

@@ -244,13 +244,14 @@ test( 'identify srcData is a Buffer', function (t) {
 });
 
 test( 'identify results', function (t) {
-    var results = imagemagick.identify({
+    var info = imagemagick.identify({
         srcData: require('fs').readFileSync( "./test/test.png" )
     });
-    t.equal( results.width, 58, 'width is 58' );
-    t.equal( results.height, 66, 'height is 66' );
-    t.equal( results.depth, 8, 'depth is 8' );
-    t.equal( results.format, 'PNG', 'format is PNG' );
+    t.equal( info.width, 58, 'width is 58' );
+    t.equal( info.height, 66, 'height is 66' );
+    t.equal( info.depth, 8, 'depth is 8' );
+    t.equal( info.format, 'PNG', 'format is PNG' );
+    t.equal( info.exif.orientation, 0, 'orientation doesnt exist' );
     t.end();
 });