Add writeln to print without breaking pbr

Author: kpcyrd

src/pb.rs

@@ -396,6 +396,13 @@ impl<T: Write> ProgressBar<T> {
         self.last_refresh_time = SteadyTime::now();
     }
 
+    /// Print a line above the progress bar
+    pub fn writeln(&mut self, s: &str) {
+        printfl!(self.handle, "\r\x1B[2K{}\n", s);
+        self.draw();
+    }
+
+
     // finish_draw ensure that the progress bar is reached to its end, and do the
     // last drawing if needed.
     fn finish_draw(&mut self) {