use catkin package xml version information

build.gradle

@@ -28,13 +28,15 @@ buildscript {
         }
     }
     dependencies {
-        classpath group: 'org.ros.rosjava_bootstrap', name: 'gradle_plugins', version: '0.1.0'
+        classpath group: 'org.ros.rosjava_bootstrap', name: 'gradle_plugins', version: '0.1.+'
     }
 }
 
+apply plugin: 'catkin'
+
 allprojects {
     group 'org.ros.rosjava_core'
-  version = '0.1.0'
+    version = project.catkin.pkg.version
 }
 
 subprojects {

message_generation_tests/build.gradle

@@ -14,8 +14,6 @@
  * the License.
  */
 
-version='0.1.0'
-
 dependencies {
   compile 'org.ros.rosjava_messages:rosjava_test_msgs:0.1.+'
   compile 'org.ros.rosjava_bootstrap:message_generation:0.1.+'

package.xml

 <?xml version="1.0"?>
 <package>
   <name>rosjava_core</name>
-  <version>0.0.0</version>
+  <version>0.1.0</version>
   <description>
     An implementation of ROS in pure-Java with Android support.
   </description>