git related improvements and implementations

+ Get-GitRepo - Clone or update a repo, with tag support
+ Get-GitHubReleaseTag - Grab tag from latest release page
+ Refresh-GitRepo - Stage all possible changes, discarding any
previously stageds changes
= GitHub repo is now git repo - as some code isn't GitHub specific
+ cat Alias for Get-Content
= Get-PossiblArguments improvement
= Invoke-WebDownload fix
= dcedit fixing bad argument processing

base/Aliases/cat.ps1

@@ -0,0 +1 @@
+Get-Content

base/Get-PossibleArguments.ps1

@@ -5,7 +5,15 @@
 )
   $local:possibleValues = $fullValueSet
   if( $wordToComplete ) {
-    $possibleValues = $possibleValues | Where-Object { $_ -match $wordToComplete }
+    $possibleValues = $possibleValues |
+        Where-Object { $_ -match $wordToComplete } |
+        ForEach-Object {
+            if( $_ -match ' ' ) {
+                "'$_'"
+            } else {
+                $_
+            }
+        }
     if( -not $strict -and ($wordToComplete -notin $possibleValues) ) {
       $possibleValues = $( $wordToComplete; $possibleValues )
     }

base/Invoke-WebDownload.ps1

@@ -33,7 +33,7 @@ process {
     $outputFileName = Join-Path $OutputPath $outputFileName
 
    if( (Test-Path $outputFileName) -and -not $Force) {
-        throw "$OutputPath already exists"
+        throw "$OutputFileName file already exists"
     }
 
     Write-Verbose "About to start download from:`n`t$Url`n`tto`n`t$outputFileName`n"