_Making splash screens in Oxygengine with RAUI_

[Oxygengine][oxygengine-git] by [@PsichiX][psichix-twitter] is the hottest

HTML5 + WASM game engine for games written in Rust with web-sys.

The goal of this project is to combine professional game development tools under

one highly modular toolset.

This month's changes include:

- Fixed bugs with rendering images on Firefox browser.

- Added support for filters.

- Updated [RAUI][raui-git] dependency to improve UI.

- Added support for image smoothing render command.

- Added [puzzle game demo WIP][oxygengine-puzzle-demo] that shows how to use RAUI

to make for example fancy splash screens with RAUI.

[psichix-twitter]: https://twitter.com/psichix

[oxygengine-git]: https://github.com/PsichiX/Oxygengine

[oxygengine-puzzle-demo]: https://github.com/PsichiX/Oxygengine/tree/master/demos/soulhunter


_RAUI Scroll Box_

[RAUI][raui-git] by [@PsichiX][psichix-twitter] is a Renderer Agnostic User

Interface crate that is based on declarative mode UI composition similar to

React.js and UE4 Slate system.

This month's changes include:

- Moved from `widget_hooks!` and `widget_component!` to `#[pre_hooks]`and

`#[post_hooks]` macros.

- Added `PropsData` and `MessageData` derive macros.

- Improved support for Scroll Box widgets to allow frictionless usage.

- Added use of Scroll Box in [TODO demo app][raui-todo-app] to demonstrate how

to use it.

[raui-git]: https://github.com/PsichiX/raui

[raui-todo-app]: https://github.com/PsichiX/raui/tree/master/demos/todo-app