Add an example to test formatting.

Author: thejpster

examples/format_test.rs

@@ -0,0 +1,7 @@
+extern crate measurements;
+use measurements::Temperature;
+fn main() {
+	let t = Temperature::from_celsius(0.1);
+	println!("{0:.9} outside", t);
+	println!("{0:.9} outside", t.as_celsius());
+}