replaced the custom vector class with a standard vector2

Source/MonoGame.Extended.Content.Pipeline/BitmapFonts/BitmapFontChar.cs

@@ -10,7 +10,7 @@ namespace MonoGame.Extended.Content.Pipeline.BitmapFonts
 	public class BitmapFontChar
 	{
 		[XmlAttribute ("id")]
-		public int ID { get; set; }
+		public int Id { get; set; }
 		
 		[XmlAttribute ("x")]
 		public int X { get; set; }

Source/MonoGame.Extended.Content.Pipeline/BitmapFonts/BitmapFontPage.cs

@@ -10,7 +10,7 @@ namespace MonoGame.Extended.Content.Pipeline.BitmapFonts
     public class BitmapFontPage
 	{
 		[XmlAttribute ( "id" )]
-        public int ID { get; set; }
+        public int Id { get; set; }
 		
 		[XmlAttribute ( "file" )]
 		public string File { get; set; }

Source/MonoGame.Extended.Content.Pipeline/BitmapFonts/BitmapFontWriter.cs

@@ -20,7 +20,7 @@ namespace MonoGame.Extended.Content.Pipeline.BitmapFonts
 
             foreach (var c in fontFile.Chars)
             {
-                writer.Write(c.ID);
+                writer.Write(c.Id);
                 writer.Write(c.Page);
                 writer.Write(c.X);
                 writer.Write(c.Y);