Renamed stroke Shape properties according to WPF naming

src/Perspex.Controls/Shapes/Shape.cs

@@ -90,11 +90,11 @@ namespace Perspex.Controls.Shapes
             set { SetValue(StrokeThicknessProperty, value); }
         }
 
-        public PenLineCap DashCap { get; set; } = PenLineCap.Flat;
+        public PenLineCap StrokeDashCap { get; set; } = PenLineCap.Flat;
 
-        public PenLineCap StartLineCap { get; set; } = PenLineCap.Flat;
+        public PenLineCap StrokeStartLineCap { get; set; } = PenLineCap.Flat;
 
-        public PenLineCap EndLineCap { get; set; } = PenLineCap.Flat;
+        public PenLineCap StrokeEndLineCap { get; set; } = PenLineCap.Flat;
 
         public override void Render(DrawingContext context)
         {
@@ -103,7 +103,7 @@ namespace Perspex.Controls.Shapes
             if (geometry != null)
             {
                 var pen = new Pen(Stroke, StrokeThickness, new DashStyle(StrokeDashArray), 
-                    DashCap, StartLineCap, EndLineCap);
+                    StrokeDashCap, StrokeStartLineCap, StrokeEndLineCap);
                 context.DrawGeometry(Fill, pen, geometry);
             }
         }

tests/Perspex.RenderTests/Shapes/PathTests.cs

@@ -149,10 +149,10 @@ namespace Perspex.Direct2D1.RenderTests.Shapes
                     StrokeThickness = 10,
                     HorizontalAlignment = HorizontalAlignment.Center,
                     VerticalAlignment = VerticalAlignment.Center,
-                    DashCap = PenLineCap.Triangle,
+                    StrokeDashCap = PenLineCap.Triangle,
                     StrokeDashArray = new PerspexList<double>(3, 1),
-                    StartLineCap = PenLineCap.Round,
-                    EndLineCap = PenLineCap.Square,
+                    StrokeStartLineCap = PenLineCap.Round,
+                    StrokeEndLineCap = PenLineCap.Square,
                     Data = StreamGeometry.Parse("M 20,20 L 180,180"),
                 }
             };