Update BuildTool project to .NET 4.0 and rebuild.

Author: ngbrown

Tools/BuildTool/BuildTool.csproj

@@ -10,7 +10,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>BuildTool</RootNamespace>
     <AssemblyName>BuildTool</AssemblyName>
-    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <TargetFrameworkProfile>Client</TargetFrameworkProfile>
     <FileAlignment>512</FileAlignment>
   </PropertyGroup>

Tools/BuildTool/app.config

@@ -1,3 +1,3 @@
 <?xml version="1.0"?>
 <configuration>
-<startup><supportedRuntime version="v2.0.50727" sku="Client"/></startup></configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0,Profile=Client"/></startup></configuration>

Tools/BuildTool/bin/Release/BuildTool.exe

@@ -1,3 +1,3 @@
 <?xml version="1.0"?>
 <configuration>
-<startup><supportedRuntime version="v2.0.50727" sku="Client"/></startup></configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0,Profile=Client"/></startup></configuration>