Add progress messages during usage

With $ProgressPreference = "SilentlyContinue" set, the script often
looks like it's hung. Inform the user what's going on more often,
particularly for slow actions.

Get-Bootcamp.ps1

@@ -19,11 +19,15 @@ if (!(Test-Path $OutputDir)) { New-Item -Path $OutputDir -ItemType Directory -Fo
 $7z = "$env:ProgramFiles\7-Zip\7z.exe"
 if (Test-Path $7z) { $7zInstalled = $true }
 if ([version](Get-ItemProperty $7z).VersionInfo.FileVersion -lt 15.14) {
+    Write-Host "7-Zip not installed, will install and remove."
     Invoke-WebRequest -Uri $SEVENZIP_URL -OutFile "$OutputDir\$($SEVENZIP_URL.Split('/')[-1])" -ErrorAction Stop
     Start-Process -FilePath $env:SystemRoot\System32\msiexec.exe -ArgumentList "/i $OutputDir\$($SEVENZIP_URL.Split('/')[-1]) /qb- /norestart" -Wait -Verbose
 }
 
+Write-Host "Using model: $Model"
+
 # Read data from sucatalog and find all Bootcamp ESD's
+Write-Host "Downloading software update catalog..."
 [xml]$sucatalog = Invoke-WebRequest -Uri $SUCATALOG_URL -Method Get -ErrorAction Stop
 $sucatalog.plist.dict.dict.dict | Where-Object { $_.String -match "Bootcamp" } | ForEach-Object {
     # Search dist files to find supported models, using regex match to find models in dist files - stole regex from brigadier's source
@@ -32,24 +36,27 @@ $sucatalog.plist.dict.dict.dict | Where-Object { $_.String -match "Bootcamp" } |
     $distXML = (Invoke-RestMethod -Uri $distURL).InnerXml
     $SupportedModels = [regex]::Matches($distXML,$modelRegex).Value
     if ($SupportedModels -contains $Model) { 
-        $version = [regex]::Match($distURL,"(\d{3}-\d{5})").Value
-        Write-Output "Found supported ESD: $Version"
+        $version = [regex]::Match($distURL,"(\d{3}-\d{4,5})").Value
+        Write-Output "Found supported ESD: $Version, posted $($_.Date)"
         [array]$bootcamplist += $_ 
     }
 }
 if ($bootcamplist.Length -gt 1) { 
-    Write-warning "Found more than 1 supported Bootcamp ESD. Selecting newest based on posted date which may not always be correct"
+    Write-Host "Found more than 1 supported Bootcamp ESD. Selecting newest based on posted date which may not always be correct"
 }
 $esd = $bootcamplist | Sort-Object -Property Date | Select-Object -Last 1
 # Build a hash table of the package's properties from the XML
 $package = $esd.array.dict.selectnodes('key') | ForEach-Object {@{$($_.'#text') = $($_.nextsibling.'#text')}}
 $package += @{'ESDVersion' = $Version}
-$download = $package.URL
+Write-Host "Selected $($package.ESDVersion) as it's the most recently posted."
 
 # Download the BootCamp ESD
-Start-BitsTransfer -Source $download -Destination "$OutputDir\BootCampESD.pkg" -ErrorAction Stop
+Write-Host "Starting download from $($package.URL)"
+Start-BitsTransfer -Source $package.URL -Destination "$OutputDir\BootCampESD.pkg" -ErrorAction Stop
+Write-Host "Download complete"
 if (Test-Path -Path "$OutputDir\BootCampESD.pkg") {
     # Extract the bootcamp installer
+    Write-Host "Extracting..."
     Invoke-Command -ScriptBlock { 
         & $7z -o"$OutputDir" -y e "$OutputDir\BootCampESD.pkg"
         & $7z -o"$OutputDir" -y e "$OutputDir\Payload~"