added title per #1470

Author: fehguy

modules/swagger-models/src/main/java/io/swagger/models/AbstractModel.java

@@ -10,6 +10,7 @@
 public abstract class AbstractModel implements Model {
     private ExternalDocs externalDocs;
     private String reference;
+    private String title;
     private final Map<String, Object> vendorExtensions = new HashMap<String, Object>();
 
     @Override
@@ -21,6 +22,16 @@ public void setExternalDocs(ExternalDocs value) {
         externalDocs = value;
     }
 
+    @Override
+    public String getTitle() {
+        return title;
+    }
+
+    @Override
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
     @JsonAnyGetter
     public Map<String, Object> getVendorExtensions() {
         return vendorExtensions;

modules/swagger-models/src/main/java/io/swagger/models/Model.java

@@ -5,6 +5,10 @@
 import java.util.Map;
 
 public interface Model {
+    String getTitle();
+
+    void setTitle(String title);
+
     String getDescription();
 
     void setDescription(String description);

modules/swagger-models/src/main/java/io/swagger/models/RefModel.java

@@ -14,6 +14,7 @@ public class RefModel implements Model {
     private ExternalDocs externalDocs;
     private Map<String, Property> properties;
     private Object example;
+    private String title;
 
     public RefModel() {
     }
@@ -27,6 +28,18 @@ public RefModel asDefault(String ref) {
         return this;
     }
 
+    // not allowed in a $ref
+    @JsonIgnore
+    @Override
+    public String getTitle() {
+        return title;
+    }
+
+    @Override
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
     // not allowed in a $ref
     @JsonIgnore
     public String getDescription() {