Windows build environment:

- Added build script
- Added build-installer script
- Added pack script
- Added gitlog script
- Use shadow build

build_scripts/Windows/tools/get-git-ref.bat

@@ -0,0 +1,39 @@
+REM Usage:
+REM call get-git-ref.bat Variable [Branch]
+
+setlocal
+
+set Variable=%~1
+if "%Variable%"=="" (
+	echo.
+	echo Parameter error
+	exit /B 1
+)
+
+set Ref=
+
+:: Check git executable
+set GitPath=
+call "%~dp0find-in-path.bat" GitPath git.exe
+if "%GitPath%"=="" (
+	echo.
+	echo Git executable not found in PATH.
+	goto exit
+)
+
+set GitParameter=
+set Branch=%~2
+if "%Branch%"=="" (
+	set Branch=HEAD
+	set GitParameter=--head
+)
+
+for /F "tokens=1*" %%A in ('git show-ref %GitParameter% %Branch%') do (
+	if "%%B"=="%Branch%" (
+		set Ref=%%A
+	)
+)
+
+:exit
+endlocal & set %Variable%=%Ref%
+exit /B 0