Improvements and bug fixes

dcl, dcll and dcre were brokeen, fixed that
Invoke-WebDownload given a URL, automatically deduce the file file.
Get-GitHubReleaseAssets - Grab URLs from a GitHub release page.
Invoke-DockerCompose updated to display progress while waiting on
background jobs.

base/Invoke-WebDownload.ps1

@@ -0,0 +1,44 @@
+[CmdletBinding()]param(
+    [Parameter(Position=1)]
+    [string]$OutputPath,
+    [Parameter(Mandatory,Position=0,ValueFromPipeline)]
+    [string]$Url,
+    [switch]$Force,
+    [switch]$PassThru
+)
+
+process {
+    $local:outputFileName=[string]::Empty
+    if( -not $OutputPath ) {
+        $OutputPath = Join-Path $(Get-Item $PWD) ''
+    } elseif( Test-Path -Type Container $OutputPath ) {
+        $OutputPath = Join-Path $(Get-Item $OutputPath) ''
+    }        
+
+    if( $OutputPath -notmatch '[/\\]$' ) {
+        $outputFileName = Split-Path -Leaf $OutputPath
+        $OutputPath = Join-Path $(Split-Path -Parent $OutputPath) ''
+    }
+
+    if( -not (Test-Path $OutputPath) -and $Force ) {
+        New-Item -Type Directory $OutputPath
+    }
+
+    if( -not (Test-Path $OutputPath) ) { throw "Destination $OutputPath does not exists, aborting!" }
+
+    if( -not $outputFileName ) {
+        $outputFileName = Split-Path -Leaf $Url
+    }
+
+    $outputFileName = Join-Path $OutputPath $outputFileName
+
+   if( (Test-Path $outputFileName) -and -not $Force) {
+        throw "$OutputPath already exists"
+    }
+
+    Write-Verbose "About to start download from:`n`t$Url`n`tto`n`t$outputFileName`n"
+
+    Invoke-WebRequest -Uri $Url -OutFile $outputFileName
+
+    if( $PassThru ) { Get-Item $outputFileName }
+}