diff --git a/OpenRA.FileFormats/ConnectedComponents.cs b/OpenRA.FileFormats/ConnectedComponents.cs
deleted file mode 100644
index 610981a0d9..0000000000
--- a/OpenRA.FileFormats/ConnectedComponents.cs
+++ /dev/null
@@ -1,87 +0,0 @@
-#region Copyright & License Information
-/*
- * Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
- * This file is part of OpenRA, which is free software. It is made 
- * available to you under the terms of the GNU General Public License
- * as published by the Free Software Foundation. For more information,
- * see LICENSE.
- */
-#endregion
-
-using System;
-using System.Collections.Generic;
-
-namespace OpenRA.FileFormats
-{
-	public static class ConnectedComponents
-	{
-		static readonly int2[] Neighbors 
-			= { new int2(-1, -1), new int2(0, -1), new int2(1, -1), new int2(-1, 0) };
-
-		public static int[,] Extract(Map m, Func<int, int, int> f)
-		{
-			var result = new int[m.MapSize.X, m.MapSize.Y];
-			var types = new int[m.MapSize.X, m.MapSize.Y];
-			var d = new Dictionary<int, Node>();
-			var n = 1;
-
-			for( var j = m.YOffset; j < m.YOffset + m.Height; j++ )
-				for (var i = m.XOffset; i < m.XOffset + m.Width; i++)
-				{
-					types[i, j] = f(i, j);
-
-					var k = n;
-
-					foreach (var a in Neighbors)
-						if (types[i + a.X, j + a.Y] == types[i, j])
-							k = (k == n) 
-								? result[i + a.X, j + a.Y]
-								: Union( d, k, result[i+a.X, j+a.Y] );
-
-					result[i,j] = k;
-					if (k == n) MakeSet(d, n++);
-				}
-
-			for (var j = m.YOffset; j < m.YOffset + m.Height; j++)
-				for (var i = m.XOffset; i < m.XOffset + m.Width; i++)
-					result[i, j] = Find(d, result[i, j]);
-
-			return result;
-		}
-
-		// disjoint-set forest stuff
-
-		class Node { public int a, b; public Node(int a, int b) { this.a = a; this.b = b; } }
-
-		static int MakeSet(Dictionary<int, Node> d, int x)
-		{
-			d[x] = new Node(x, 0);
-			return x;
-		}
-
-		static int Union(Dictionary<int, Node> d, int x, int y)
-		{
-			var xr = Find(d, x);
-			var yr = Find(d, y);
-			var xa = d[xr].b;
-			var ya = d[yr].b;
-
-			if (xa > ya) d[yr].a = xr;
-			else if (xa < ya) d[xr].a = yr;
-			else if (xr != yr)
-			{
-				d[yr].a = xr;
-				++d[xr].b;
-			}
-
-			return xr;
-		}
-
-		static int Find(Dictionary<int, Node> d, int x)
-		{
-			if (d[x].a == x) return x;
-			return d[x].a = Find(d, d[x].a);
-		}
-
-	}
-}
diff --git a/OpenRA.FileFormats/OpenRA.FileFormats.csproj b/OpenRA.FileFormats/OpenRA.FileFormats.csproj
index 40b0cac5f0..e0b6750b12 100644
--- a/OpenRA.FileFormats/OpenRA.FileFormats.csproj
+++ b/OpenRA.FileFormats/OpenRA.FileFormats.csproj
@@ -52,8 +52,6 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="ConnectedComponents.cs" />
-    <Compile Include="DisposableAction.cs" />
     <Compile Include="Evaluator.cs" />
     <Compile Include="Exts.cs" />
     <Compile Include="FieldLoader.cs" />
@@ -67,6 +65,7 @@
     <Compile Include="PackageWriter.cs" />
     <Compile Include="Palette.cs" />
     <Compile Include="PlayerColorRemap.cs" />
+    <Compile Include="Primitives\DisposableAction.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Thirdparty\Random.cs" />
     <Compile Include="Session.cs" />
diff --git a/OpenRA.FileFormats/DisposableAction.cs b/OpenRA.FileFormats/Primitives/DisposableAction.cs
similarity index 100%
rename from OpenRA.FileFormats/DisposableAction.cs
rename to OpenRA.FileFormats/Primitives/DisposableAction.cs
diff --git a/thirdparty/ICSharpCode.SharpZipLib.dll b/thirdparty/ICSharpCode.SharpZipLib.dll
new file mode 100644
index 0000000000..fe643ebc63
Binary files /dev/null and b/thirdparty/ICSharpCode.SharpZipLib.dll differ