Fixing stylecop warnings on whitespace and usings.

src/ImageSharp/Colors/PackedPixel/IPackedPixel.cs

@@ -6,6 +6,7 @@
 namespace ImageSharp
 {
     using System;
+
     /// <summary>
     /// An interface that represents a packed pixel type.
     /// </summary>

src/ImageSharp/Drawing/Brushes/Brushes`2.cs

@@ -3,10 +3,10 @@
 // Licensed under the Apache License, Version 2.0.
 // </copyright>
 
-using System;
-
 namespace ImageSharp.Drawing.Brushes
 {
+    using System;
+
     /// <summary>
     /// A collection of methods for creating generic brushes.
     /// </summary>

src/ImageSharp/Drawing/Brushes/PatternBrush`2.cs

@@ -5,10 +5,10 @@
 
 namespace ImageSharp.Drawing.Brushes
 {
+    using System;
     using System.Numerics;
 
     using Processors;
-    using System;
 
     /// <summary>
     /// Provides an implementation of a pattern brush for painting patterns.

src/ImageSharp/Drawing/Draw.cs

@@ -220,6 +220,7 @@ namespace ImageSharp
         {
             return source.DrawPolygon(pen, new Polygon(new LinearLineSegment(points)), options);
         }
+
         /// <summary>
         /// Draws the provided Points as a closed Linear Polygon with the provided Pen.
         /// </summary>

src/ImageSharp/Drawing/Processors/DrawPathProcessor.cs

@@ -134,7 +134,7 @@ namespace ImageSharp.Drawing.Processors
                             currentPoint.X = offsetX;
                             currentPoint.Y = offsetY;
 
-                            var dist = Closest(currentPoint);
+                            var dist = this.Closest(currentPoint);
 
                             var color = applicator.GetColor(dist);