Support for PLY to PTS conversion

A bit of code refactoring and added support for converting from PLY to PTS, since Unreal Engine likes .pts files and I had some issues with .pts files generated straight from Houdini, while the ones generated from this simple python app worked well.
Most of the stuff still seems to work fine, but I haven't tested it on Linux/Windows so I can't guaranteed for all platforms.

First release with binaries

Conversion should work on macos, linux and windows