wtk 0.1.0

Simple widget toolkit
Documentation 
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= Rust Widget Tool Kit

Wtk is a widget toolkit for rust. The goal is to create a platform agnostic toolkit that can later be used for my own linux userland https://github.com/LevitatingBusinessMan/azathos[Azathos]. Currently only SDL2 is supported as a backend.

== Examples

```RUST
use wtk;
use wtk::prelude::*;

fn main() {
    let mut app = App::<SDLBackend>::new("WTK button example");
    let button = Button::new("clickme", |b| {
        b.set_text("clicked");
    }).shared();
    app.add_widget(button.clone());
    app.run();
}
```

```C
#include <libwtk.h>

void on_click(wtk_button_t button) {
    wtk_button_set_text("clicked", button);
}

int main(void) {
    wtk_app_t app = wtk_app_sdl_new("WTK button example");
    wtk_button_t button = wtk_button_new("clickme", on_click);
    wtk_app_sdl_add_widget(app, wtk_button_share(button));
    wtk_app_run(app);
    wtk_app_sdl_destroy(app);
}
```