Upgrade Go on Windows to 1.1 final

installer.ps1

@@ -129,8 +129,8 @@ $env:Path += ";C:\ProgramData\Composer\bin"; [Environment]::SetEnvironmentVariab
 # Go
 #
 Write-Host "Installing Go...`n"
-$go_url = "https://go.googlecode.com/files/go1.1rc3.windows-amd64.msi"
-$go_local = "$workdir\go1.1rc3.windows-amd64.msi"
+$go_url = "https://go.googlecode.com/files/go1.1.windows-amd64.msi"
+$go_local = "$workdir\go1.1.windows-amd64.msi"
 (New-Object System.Net.WebClient).DownloadFile($go_url, $go_local)
 Start-Process $go_local "/passive" -Wait
 $env:Path += ";C:\Go\bin"; [Environment]::SetEnvironmentVariable("Path", $env:Path, [System.EnvironmentVariableTarget]::Machine)