Adjustments for creating installations on various operating systems

Add code signing options for macOS.
Adjust make.bat to create venv to use PyInstaller.
Preparing script for Linux to use in /usr/bin.

make.bat

@@ -0,0 +1,39 @@
+@echo off
+set PACKAGE=revpicommander
+set APP_NAME=RevPi Commander
+
+if "%1" == "venv" goto venv
+if "%1" == "installer" goto installer
+if "%1" == "clean" goto clean
+
+echo Make script for "%APP_NAME%" on Windows
+echo.
+echo Need action:
+echo     venv        Create / update your virtual environment for build process
+echo     installer   Build this application with PyInstaller
+echo     clean       Clean up your environment after build process
+goto end
+
+:venv
+python -m venv venv
+venv\\Scripts\\pip.exe install --upgrade -r requirements.txt
+goto end
+
+:installer
+venv\\Scripts\\pyinstaller -n "%APP_NAME%" ^
+	--add-data="src\%PACKAGE%\locale;.\%PACKAGE%\locale" ^
+	--add-data="data\%PACKAGE%.ico;." ^
+	--icon=data\\%PACKAGE%.ico ^
+	--noconfirm ^
+	--clean ^
+	--onedir ^
+	--windowed ^
+	src\\%PACKAGE%\\__main__.py
+goto end
+
+:clean
+rmdir /S /Q build dist
+rmdir /S /Q src\%PACKAGE%.egg-info
+del *.spec
+
+:end