Stub to create filenames based on time and log level.

examples/demo.rs

@@ -3,8 +3,8 @@ use std::thread;
 
 use glog;
 
-fn main() {
-    glog::init();
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    glog::init()?;
 
     trace!("trace!");
     debug!("debug!");
@@ -14,4 +14,5 @@ fn main() {
 
     let handle = thread::spawn(|| error!("from a second thread"));
     handle.join();
+    Ok(())
 }