creategameprojects now tries to Install SDK base Multiplayer 2013 if it's not installed

mp/src/creategameprojects.bat

@@ -1,3 +1,4 @@
+@echo off
 devtools\bin\vpc.exe /hl2mp +game /mksln momentum.sln
 copy momentum.sln+sln_fix.txt momentum.sln
 Powershell.exe -ExecutionPolicy Bypass -File creategameprojects.ps1

mp/src/creategameprojects.ps1

@@ -4,12 +4,19 @@ if (-NOT ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdent
 	pause
 	exit
 }
-
+$ErrorActionPreference= 'silentlycontinue'
 $path = (Get-ItemProperty "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Steam App 243750" -Name InstallLocation).InstallLocation
 
 if (!$path)
 {
-	Write-Warning "You should install Source SDK Base 2013 Multiplayer."
+	Write-Warning "You should install Source SDK Base 2013 Multiplayer.`nRequesting Steam to install the app..."
+    try {
+        $cmd ="cmd.exe"
+        &$cmd "/c start steam://install/243750/"
+    }
+    catch {
+        "Steam is not running."
+    }
 	pause
 	exit
 }
@@ -37,4 +44,4 @@ $data = @"
 </Project>
 "@
 
-$data | Out-File game\client\client_hl2.vcxproj.user utf8
+$data | Out-File game\client\client_hl2.vcxproj.user utf8