Major refactoring and script progress report

After coming up with the name Fusion for the ide, I decided to refactor the whole project to be called Fusion. So instead of vividengine, it's fusion engine. instead of vividscript, it's fusion script.

Not just names, but major refactoring of class names etc.

As for the newly titled fusionscript, I am half way through a complete rewrite of the parser. Also it now has reverse polish expressions, meaning they finally work like any other language.