* Remove redundant brackets
* Various hlint fixes
* Remove unused language pragrams and other fixes
* Use addStatic more consistently in examples
* Rename remaining usages of sceneAnimation to scene
* Set viewbox to 16 by 9.
* Update examples and fix process termination bug in driver.
* Add module for constants.
Former-commit-id: 1c77569e771455e674485e2fc58ee57e7df5f3c5