1.0.0-alpha1 release (for Windows-64bit only)

This is the first somewhat-working, API-stable and ABI-stable release.

Tutorial / Guide: https://azul.rs/guide
API documentation: https://azul.rs/api/1.0.0-alpha1
Release: https://azul.rs/release/1.0.0-alpha1
Crates.io: https://crates.io/crates/azul/1.0.0-alpha1

Currently Azul only supports dynamic linking: Set AZUL_LINK_PATH to the folder of the DLL.
See the Installation guide for more info

In the next coming days I'll work on the C++ API as well as more patches for scrolling and menus / context menus. There are a lot of bugs, but it should not crash, leak memory or flicker anymore. The API is stable, the ABI may be still subject to change. From now on I will only add functions, but not remove any.