Added forever-loop to update bar contents at interval

* New argument --interval to specify update interval

src/common/mod.rs

@@ -12,8 +12,8 @@ pub enum TemperatureUnits {
 impl fmt::Display for TemperatureUnits {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
-           TemperatureUnits::Metric => write!(f, "Metric"),
-           TemperatureUnits::Imperial => write!(f, "Imperial"),
+           TemperatureUnits::Metric     => write!(f, "Metric"),
+           TemperatureUnits::Imperial   => write!(f, "Imperial"),
        }
     }
 }
@@ -23,9 +23,10 @@ impl fmt::Display for TemperatureUnits {
 // --------------------
 #[derive(Debug,Clone)]
 pub struct AppOptions {
-    pub weather_units: TemperatureUnits,
-    pub weather_station: String,
-    pub music_progress: bool,
-    pub debug: bool,
-    pub debug_modules: bool,
+    pub interval:           u64,
+    pub weather_units:      TemperatureUnits,
+    pub weather_station:    String,
+    pub music_progress:     bool,
+    pub debug:              bool,
+    pub debug_modules:      bool,
 }