Moved example to separate directory

And add it to Cargo.toml

Cargo.toml

@@ -3,9 +3,6 @@ name = "cursive"
 version = "0.1.0"
 authors = ["Alexandre Bury <alexandre.bury@gmail.com>"]
 
-[[bin]]
-name = "cursive-example"
-
 [lib]
 name = "cursive"
 
@@ -14,3 +11,6 @@ name = "cursive"
 [dependencies.ncurses]
 git = "https://github.com/jeaye/ncurses-rs"
 
+[[example]]
+name = "hello_world"
+path = "examples/hello_world.rs"

examples/hello_world.rs

@@ -11,9 +11,5 @@ fn main() {
 
     siv.add_layer(TextView::new("Hello World!\nPress q to quit the application."));
 
-    siv.add_global_callback('a' as i32, |s, _| {
-        //
-    });
-
     siv.run();
 }