minor changes to get Threebox to work and build in angular.

[akexinad]

When using the threebox npm package in angular, you get:

1. There was a three.js file import missing and that was added.
2. Warnings regarding filename casings. I refactored the casings accordingly so when you run ng-serve it serves warning-free.
3. When you run ng-build --prod, you are with an error from terser saying that there is a missing token name ( static ) which is one of the variable names in the object.js file. I renamed this variable to fixed.