Implement ASCII-only widget titles

Widget titles can now be specified in the config file via a 'title' key.
Example:

  wtf:
    mods:
      todo:
        title: Tada

which can include emoji. No need to force everyone to look at my emoji,
now they can define their own.

status/widget.go

@@ -18,7 +18,7 @@ type Widget struct {
 
 func NewWidget() *Widget {
 	widget := Widget{
-		TextWidget:  wtf.NewTextWidget(" 🎉 Status ", "status", false),
+		TextWidget:  wtf.NewTextWidget(" Status ", "status", false),
 		CurrentIcon: 0,
 	}