Add an example (named 'print') that writes to stdout

README.md

@@ -35,4 +35,12 @@ fn main() {
 }
 ```
 
-Currently this project only creates recurrence rule strings, it does not parse strings into typed object.
+Currently this project only creates recurrence rule strings, it does not parse strings into typed object.
+
+### Running the examples in this codebase
+
+```
+$ cargo run --example print
+```
+
+Change `print` to the name of whichever example you'd like to run.

examples/print.rs

@@ -0,0 +1,13 @@
+use rfc5545::{
+    Frequency as Freq,
+    RecurRulePart as Part,
+    RecurrenceRule as Rule,
+};
+
+fn main() {
+    // Once per month, for 3 months total.
+    println!("{}", Rule::new_with_parts(vec![
+        Part::Freq(Freq::Monthly),
+        Part::Count(3),
+    ]));
+}