Version 4 RELEASE of V-HACD

This release reflects the new version 4 of V-HACD which was a complete and total rewrite of all previous versions. In addition there has been a lot of cleanup and refactoring of the code as well as bug fixes and various feature requests.

I would like to give a particular thanks to @Evangel63 who did a massive code cleanup that reduced the code size by almost 3,000 lines. He also found a memory leak and fixed it.

Also, just thanks to everyone who has made contributions to the code to improve it. I find this very gratifying as the whole point of open source is that the community can make something better. And you have.