update readme

README.md

@@ -8,13 +8,25 @@ It doesn't do much yet.
 
 You will need [SBT](http://scala-sbt.org). We recommend [this version](https://github.com/paulp/sbt-extras).
 
+To compile:
 ```
 $ sbt compile
+```
+
+To read a message:
+```
 $ echo '(people = [(id = 123, name = "Alice", email = "alice@example.com", employment = (school = "MIT"))])' \
  | capnp encode examples/src/main/schema/addressbook.capnp AddressBook \
  | java -cp runtime/target/scala-2.11/classes:examples/target/scala-2.11/classes/ \
    org.capnproto.examples.AddressbookMain read
 ```
 
+To write a message:
+```
+$ java -cp runtime/target/scala-2.11/classes:examples/target/scala-2.11/classes/  \
+  org.capnproto.examples.AddressbookMain write \
+  | capnp decode examples/src/main/schema/addressbook.capnp AddressBook
+```
+
 To generate IntelliJ project files, do `sbt update gen-idea`.
 

examples/src/main/java/org/capnproto/examples/AddressbookMain.java

@@ -15,8 +15,6 @@ import org.capnproto.examples.Addressbook.*;
 public class AddressbookMain {
 
     public static void writeAddressBook() throws java.io.IOException {
-        System.err.println("WARNING: writing is not yet fully implemented");
-
         MessageBuilder message = new MessageBuilder();
         AddressBook.Builder addressbook = message.initRoot(AddressBook.Builder.factory);
         StructList.Builder<Person.Builder> people = addressbook.initPeople(2);