epi: the egui application programming interface

epi is a backend-agnostic interface for writing apps using egui (a platform agnostic GUI library).

This crate provides a common interface for programming an app using egui, which can then be easily plugged into eframe (which is a wrapper over egui_web, egui_glium and egui_glow).

This crate is only for those that want to write an app that can be compiled both natively and for the web.