Add joda-time management

This is a common library that is used by downstream software so we
should manage its version here.

Author: hinerm

pom.xml

@@ -229,6 +229,9 @@ Projects wishing to use pom-scijava as a parent project need to override the &lt
 		<!-- Jetty - http://eclipse.org/jetty/ -->
 		<jetty.version>8.0.0.M1</jetty.version>
 
+		<!-- Joda-Time - http://www.joda.org/joda-time/ -->
+		<joda-time.version>2.3</joda-time.version>
+
 		<!-- Additional configuration -->
 
 		<!-- NB: Avoid platform encoding warning when copying resources. -->
@@ -514,6 +517,13 @@ Projects wishing to use pom-scijava as a parent project need to override the &lt
 				<classifier>swing</classifier>
 			</dependency>
 
+			<!-- Joda-Time - http://www.joda.org/joda-time/ -->
+			<dependency>
+				<groupId>joda-time</groupId>
+				<artifactId>joda-time</artifactId>
+				<version>${joda-time.version}</version>
+			</dependency>
+
 			<!-- JUnit - http://junit.org/ -->
 			<dependency>
 				<groupId>junit</groupId>