* Using tracing-subscriber in hello_world example
* Add Key::Plus/Minus/Equals
* Warn if failing to guess OS from User-Agent
* Remove jitter when using Context::set_pixels_per_point
* Demo app: zoom in/out using ⌘+ and ⌘-
* Demo app: make backend panel GUI scale slider better
* Optimize debug builds a bit
* typo
* Update changelog
* Add helper module `egui::gui_zoom` for zooming an app
* Better names, and update changelog
* Combine Plus and Equals keys
* Last fix
* Fix docs
* Move examples out of eframe/examples into examples/
Give each example a `Cargo.toml` and `src/main.rs`.
This makes it easier for people to use as templates.
* Update README.md with more deps needed on vanilla Ubuntu
* Install libgtk-3-dev on CI, hoping that will fix something
