update docker build script for new version
add script to build mac-osx pyinstaller package
Change pandoc_converter.py - removed check for is-pandoc-installed this was a double check as already tested when checking version number and converting strings.  It also caused an issue when Windows Defender antivirus no longer allowed a single file build from pyinstaller as shutil would not find the pandoc exe for no apparent reasons so removed the check.

Version 1.3.0 Release