fixed small bug in write attributes

Source/SvgElement.cs

@@ -508,7 +508,7 @@ namespace Svg
         {
             parentAttributeValue = null;
 
-            attributeKey = char.ToUpper(attributeKey[0]) + attributeKey.Substring(1);
+            //attributeKey = char.ToUpper(attributeKey[0]) + attributeKey.Substring(1);
 
             var currentParent = Parent;
             var resolved = false;

Source/Text/SvgText.cs

@@ -213,7 +213,7 @@ namespace Svg
         /// <value>The fill.</value>
         public override SvgPaintServer Fill
         {
-            get { return (this.Attributes["fill"] == null) ? new SvgColourServer(Color.Black) : (SvgPaintServer)this.Attributes["Fill"]; }
+            get { return (this.Attributes["fill"] == null) ? new SvgColourServer(Color.Black) : (SvgPaintServer)this.Attributes["fill"]; }
             set { this.Attributes["fill"] = value; }
         }