Adding more fields to build file

Author: yepher

libs/sparkpost-lib/src/main/java/com/sparkpost/Build.java

@@ -3,10 +3,14 @@
 
 public class Build {
 
-    public static final String VERSION = "0.11";
+    public static final String VERSION = "VERSION_NUMBER";
 
     public static final String BUILD_VERSION = "BUILD_GENERATED_VERSION";
 
     public static final String GIT_HASH = "BUILD_GENERATED_GIT_HASH";
 
+    public static final String GIT_SHORT_HASH = "BUILD_GENERATED_SHORT_GIT_HASH";
+
+    public static final String BUILD_DATE = "BUILD_GENERATED_DATE";
+
 }