Add createdAt field to CommitComment (#180)

src/main/java/org/gitlab/api/models/CommitComment.java

@@ -2,6 +2,8 @@ package org.gitlab.api.models;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.util.Date;
+
 public class CommitComment {
 
 	public static final String URL = "/comments";
@@ -14,6 +16,9 @@ public class CommitComment {
 	@JsonProperty("line_type")
 	private String lineType;
 
+	@JsonProperty("created_at")
+	private Date createdAt;
+
 	public GitlabUser getAuthor() {
 		return author;
 	}
@@ -53,4 +58,12 @@ public class CommitComment {
 	public void setLineType(String lineType) {
 		this.lineType = lineType;
 	}
+
+	public Date getCreatedAt() {
+		return createdAt;
+	}
+
+	public void setCreatedAt(Date createdAt) {
+		this.createdAt = createdAt;
+	}
 }