* Move all epi-related code from egui_glow into eframe
* Move epi stuff from egui-winit into eframe
* Remove mention of epi in egui
* Remove mention of epi in egui_glium
* Remove trait epi::NativeTexture
* Remove confusing mentions of epi
* Refactor egui_web: break up into smaller files
* Clean up feature flags further, and update changelogs
* Clean up check.sh
* Small cleanup of egui_web/Cargo.toml
* Fix dependencies for pure_glow example
* Fix clippy false positive
* Add Shape::Callback to do custom rendering inside of an egui UI
* Use Rc<glow::Context> everywhere
* Remove trait WebPainter
* Add glow::Context to epi::App::setup
* Move texture allocation into epaint/egui proper
* Add TextureHandle
* egui_glow: cast using bytemuck instead of unsafe code
* Optimize glium painter
* Optimize WebGL
* Add example of loading an image from file