Update dotnet-install.ps1 to stop overwriting dotnet.exe

Also, update to NuGet.exe 4.0.0-rc4

build/KoreBuild.ps1

@@ -98,7 +98,7 @@ if (!(Test-Path "$koreBuildFolder\Sake"))
     }
 
     # We still nuget because dotnet doesn't have support for pushing packages
-    Invoke-WebRequest "https://dist.nuget.org/win-x86-commandline/v3.5.0-beta2/NuGet.exe" -OutFile "$koreBuildFolder/nuget.exe"
+    Invoke-WebRequest "https://dist.nuget.org/win-x86-commandline/v4.0.0-rc4/NuGet.exe" -OutFile "$koreBuildFolder/nuget.exe"
 }
 
 $makeFilePath = "makefile.shade"

build/KoreBuild.sh

@@ -108,7 +108,7 @@ export DOTNET_REFERENCE_ASSEMBLIES_PATH=$netFrameworkContentDir
 
 nugetPath="$koreBuildFolder/nuget.exe"
 if [ ! -f $nugetPath ]; then
-    nugetUrl="https://dist.nuget.org/win-x86-commandline/v3.5.0-beta2/NuGet.exe"
+    nugetUrl="https://dist.nuget.org/win-x86-commandline/v4.0.0-rc4/NuGet.exe"
     wget -O $nugetPath $nugetUrl 2>/dev/null || curl -o $nugetPath --location $nugetUrl 2>/dev/null
 fi
 

build/dotnet/dotnet-install.ps1

@@ -69,7 +69,7 @@ $BinFolderRelativePath=""
 
 # example path with regex: shared/1.0.0-beta-12345/somepath
 $VersionRegEx="/\d+\.\d+[^/]+/"
-$OverrideNonVersionedFiles=$true
+$OverrideNonVersionedFiles=$false
 
 function Say($str) {
     Write-Host "dotnet-install: $str"