Added some types and outlined the api

src/main/java/postageapp/PostageAppClient.java

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+package postageapp;
+
+import java.util.List;
+
+import postageapp.models.*;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: stephanleroux
+ * Date: 2012-11-23
+ * Time: 6:09 PM
+ * To change this template use File | Settings | File Templates.
+ */
+public interface PostageAppClient {
+    public void sendMessage();
+
+    public int getMessageReceipt();
+
+    public List<String> getMethodList();
+
+    public AccountInfo getAccountInfo();
+
+    public ProjectInfo getProjectInfo();
+
+    public List<Message> getMessages();
+
+    public List<MessageTransmission> getMessageTransmissions();
+
+    public ProjectMetrics getMetrics();
+}

src/main/java/postageapp/http/PostageAppHttpClient.java

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+package postageapp.http;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: stephanleroux
+ * Date: 2012-11-23
+ * Time: 6:10 PM
+ * To change this template use File | Settings | File Templates.
+ */
+public interface PostageAppHttpClient {
+}

src/main/java/postageapp/models/AccountInfo.java

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+package postageapp.models;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: stephanleroux
+ * Date: 2012-11-23
+ * Time: 6:17 PM
+ * To change this template use File | Settings | File Templates.
+ */
+public class AccountInfo {
+}

src/main/java/postageapp/models/Message.java

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+package postageapp.models;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: stephanleroux
+ * Date: 2012-11-23
+ * Time: 6:20 PM
+ * To change this template use File | Settings | File Templates.
+ */
+public class Message {
+}

src/main/java/postageapp/models/MessageTransmission.java

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+package postageapp.models;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: stephanleroux
+ * Date: 2012-11-23
+ * Time: 6:22 PM
+ * To change this template use File | Settings | File Templates.
+ */
+public class MessageTransmission {
+}

src/main/java/postageapp/models/ProjectInfo.java

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+package postageapp.models;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: stephanleroux
+ * Date: 2012-11-23
+ * Time: 6:19 PM
+ * To change this template use File | Settings | File Templates.
+ */
+public class ProjectInfo {
+}

src/main/java/postageapp/models/ProjectMetrics.java

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+package postageapp.models;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: stephanleroux
+ * Date: 2012-11-23
+ * Time: 6:22 PM
+ * To change this template use File | Settings | File Templates.
+ */
+public class ProjectMetrics {
+}