Add Default implementation for SysTimer

Author: eldruin

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 
 - Added implementation of transactional SPI and I2C traits.
+- `Default` implementation for `SysTimer`.
 
 ### Changed
 

src/timer.rs

@@ -26,6 +26,12 @@ impl SysTimer {
     }
 }
 
+impl Default for SysTimer {
+    fn default() -> SysTimer {
+        SysTimer::new()
+    }
+}
+
 impl CountDown for SysTimer {
     type Time = Duration;