Powershell scripts to dump commit and contributor lists.

Tools/dump_contributors_since.ps1

@@ -0,0 +1,16 @@
+#!/usr/bin/env pwsh
+
+    [cmdletbinding()]
+
+param(
+    [Parameter(Mandatory=$true)]
+    [DateTime]$since);
+
+$engine = & "$PSScriptRoot\dump_commits_since.ps1" -repo space-wizards/RobustToolbox -since $since
+$content = & "$PSScriptRoot\dump_commits_since.ps1" -repo space-wizards/space-station-14 -since $since
+
+($content + $engine) `
+    | Select-Object -ExpandProperty author `
+    | Select-Object -ExpandProperty login -Unique `
+    | Sort-Object `
+    | Join-String -Separator ", "