fetch Mono.Nat from nuget

.gitignore

@@ -31,6 +31,7 @@ thirdparty/SharpFont*
 thirdparty/windows/freetype6.dll
 thirdparty/nunit*
 thirdparty/windows/SDL2.dll
+thirdparty/Mono.Nat.dll
 
 # backup files by various editors
 *~

OpenRA.Game/OpenRA.Game.csproj

@@ -53,7 +53,7 @@
       <HintPath>..\thirdparty\SharpFont.dll</HintPath>
       <Private>False</Private>
     </Reference>
-    <Reference Include="Mono.Nat, Version=1.1.0.0, Culture=neutral">
+    <Reference Include="Mono.Nat">
       <SpecificVersion>False</SpecificVersion>
       <Private>False</Private>
       <Package>mono.nat</Package>

thirdparty/README

@@ -10,11 +10,6 @@ FuzzyLogicLibrary.dll
 	Version 1.2.0
 	GPL v2.0 license
 
-Mono.Nat.dll
-	http://projects.qnetp.net/projects/show/mono-nat
-	Version 1.1.0
-	MIT license
-
 SDL2-CS.dll
 	https://github.com/flibitijibibo/SDL2-CS/
 	Commit e8731efadb249a40f46d646e2b783ec588326ea6

thirdparty/fetch-thirdparty-deps.ps1

@@ -59,4 +59,12 @@ if (!(Test-Path "windows/SDL2.dll"))
 	cp sdl2.redist.2.0.3/build/native/bin/Win32/dynamic/SDL2.dll ./windows/
 	rmdir sdl2.2.0.3 -Recurse
 	rmdir sdl2.redist.2.0.3 -Recurse
+}
+
+if (!(Test-Path "Mono.Nat.dll"))
+{
+	echo "Fetching Mono.Nat from NuGet."
+	./nuget.exe install Mono.Nat -Version 1.2.21
+	cp Mono.Nat.1.2.21.0/lib/net40/Mono.Nat.dll .
+	rmdir  Mono.Nat.1.2.21.0 -Recurse
 }

thirdparty/fetch-thirdparty-deps.sh

@@ -47,4 +47,11 @@ if [ ! -f windows/SDL2.dll ]; then
 	nuget install sdl2 -Version 2.0.3
 	cp ./sdl2.redist.2.0.3/build/native/bin/Win32/dynamic/SDL2.dll ./windows/
 	rm -rf sdl2.2.0.3 sdl2.redist.2.0.3
+fi
+
+if [ ! -f Mono.Nat.dll ]; then
+	echo "Fetching Mono.Nat from nuget"
+	nuget install Mono.Nat -Version 1.2.21
+	cp ./Mono.Nat.1.2.21.0/lib/net40/Mono.Nat.dll .
+	rm -rf Mono.Nat.1.2.21.0
 fi