(GH-405) Cache downloads by name and version

When downloading files from the internet, cache the file in a folder
with the package name and the package version. This way the package
isn't mistaken for a different version when the file sizes match (when
checksumming isn't used).

src/chocolatey.resources/helpers/chocolateyScriptRunner.ps1

@@ -22,6 +22,7 @@ $Note = "Green"
 
 $version = $env:packageVersion
 $packageName = $env:packageName
+$packageVersion = $env:packageVersion
 $packageFolder = $env:packageFolder
 
 $helpersPath = (Split-Path -parent $MyInvocation.MyCommand.Definition);

src/chocolatey.resources/helpers/functions/Install-ChocolateyPackage.ps1

@@ -85,6 +85,7 @@ param(
 
   $chocTempDir = Join-Path $env:TEMP "chocolatey"
   $tempDir = Join-Path $chocTempDir "$packageName"
+  if ($env:packageVersion -ne $null) {$tempDir = Join-Path $tempDir "$env:packageVersion"; }
 
   if (![System.IO.Directory]::Exists($tempDir)) { [System.IO.Directory]::CreateDirectory($tempDir) | Out-Null }
   $file = Join-Path $tempDir "$($packageName)Install.$fileType"

src/chocolatey.resources/helpers/functions/Install-ChocolateyZipPackage.ps1

@@ -76,6 +76,8 @@ param(
 
   $chocTempDir = Join-Path $env:TEMP "chocolatey"
   $tempDir = Join-Path $chocTempDir "$packageName"
+  if ($env:packageVersion -ne $null) {$tempDir = Join-Path $tempDir "$env:packageVersion"; }
+
   if (![System.IO.Directory]::Exists($tempDir)) {[System.IO.Directory]::CreateDirectory($tempDir) | Out-Null}
   $file = Join-Path $tempDir "$($packageName)Install.$fileType"