Add log and env_logger

Relates #7

.gitignore

@@ -1,3 +1,3 @@
 /target
 **/*.rs.bk
-Cargo.lock
+Cargo.lock

Cargo.toml

@@ -20,6 +20,7 @@ features = ["winit"]
 [dependencies]
 stretch = "0.2"
 twox-hash = "1.5"
+log = "0.4.8"
 
 # Enable to obtain conversion traits
 winit = { version = "0.20.0-alpha3", optional = true }
@@ -28,3 +29,4 @@ winit = { version = "0.20.0-alpha3", optional = true }
 # A personal `ggez` fork that introduces a `FontCache` type to measure text
 # efficiently and fixes HiDPI issues.
 ggez = { version = "0.5", git = "https://github.com/hecrj/ggez.git" }
+env_logger = "0.6.2"

examples/tour/main.rs

@@ -12,6 +12,8 @@ use ggez::filesystem;
 use ggez::graphics;
 use ggez::input::mouse;
 
+extern crate env_logger;
+
 pub fn main() -> ggez::GameResult {
     let (context, event_loop) = {
         &mut ggez::ContextBuilder::new("iced", "ggez")
@@ -33,6 +35,7 @@ pub fn main() -> ggez::GameResult {
         true,
     );
 
+    env_logger::init();
     let state = &mut Game::new(context)?;
 
     event::run(context, event_loop, state)

src/lib.rs

@@ -196,6 +196,7 @@
 #![deny(unused_results)]
 #![deny(unsafe_code)]
 #![deny(rust_2018_idioms)]
+#[macro_use] extern crate log;
 pub mod input;
 pub mod renderer;
 pub mod widget;