The Logger system can now be expanded with external logging libraries.

While external loggers can be used, if you are compiling with
--features use_std, then it will default to just printing everything
to the stdout unless a logger is created.

This library can be used without the STD library, however, you will have
to write an external logger.

examples/logging.rs

@@ -6,7 +6,14 @@ extern crate scribe;
 pub fn main()
 {
    debug!("This seemed to work alright.");
+   debug!(domain: "Temp Domain", "This seemed to work alright.");
+
    info!("Jason is awesome.");
+   info!(domain: "Temp Domain", "Jason is awesome.");
+
    warn!("Danger Will Robinson, danger!");
-   error!("There was an error!");
+   warn!(domain: "Temp Domain", "Danger Will Robinson, danger!");
+
+   //error!("There was an error!");
+   //error!(domain: "Temp Domain", "There was an error!");
 }