Add windows bash commandline build

app/build.bat

@@ -0,0 +1,51 @@
+@echo off 
+
+if "%1" == "" (
+  goto :usage
+)
+if "%2" == "" (
+  goto :usage
+)
+
+set ARCH=
+set SPEC=
+set WIN=
+if /I "%1"=="x86" (
+  set ARCH=x86
+  set WIN=win32
+  set SPEC=msvc2017
+)
+if /I "%1"=="x86_64" (
+  set ARCH=x86_amd64
+  set WIN=win64
+  set SPEC=msvc2017_64
+)
+if "%ARCH%" == "" (
+  goto :usage
+)
+
+set QT_VER=
+if /I "%2"=="5.14.1" (
+  set QT_VER=5.14.1
+)
+if "%QT_VER%" == "" (
+  goto :usage
+)
+
+@REM Setup Visual Studio Express 2017
+
+call "C:\Program Files (x86)\Microsoft Visual Studio\2017\WDExpress\VC\Auxiliary\Build\vcvarsall.bat" %ARCH%
+
+@REM Run qmake for VS2017
+
+C:\Qt\%QT_VER%\%SPEC%\bin\qmake ..\SysTray-X\SysTray-X.pro -spec win32-msvc
+nmake
+xcopy /Q /Y release\SysTray-X.exe ..\dist\%WIN%\
+C:\Qt\%QT_VER%\%SPEC%\bin\windeployqt.exe ..\dist\%WIN%\SysTray-X.exe
+
+goto :end
+
+:usage
+  echo Usage: build.bat ^< x86 ^| x86_64 ^> ^< Qt version ^>
+
+:end