Added first line

Scripts/make-install.ps1

@@ -1,4 +1,4 @@
-@echo off
+#!/snap/bin/powershell
 ::
 :: Syntax:	make-install.ps1 <build-dir>
 :: Description:	Copies newer EXE's + DLL's from the build directory to the installation directory.

Scripts/screenshot.ps1

@@ -1,3 +1,5 @@
+#!/snap/bin/powershell
+
 Function Get-TimedScreenshot {
 <#
 .SYNOPSIS

Scripts/screenshots.ps1

@@ -1,3 +1,5 @@
+#!/snap/bin/powershell
+
 Function Get-TimedScreenshot {
 <#
 .SYNOPSIS

Scripts/validate_xml.ps1

@@ -1,3 +1,5 @@
+#!/snap/bin/powershell
+
 function Validate-Xml {
 	param ([string]$XmlFilePath)
 	try {