Determining version based on manifest file

This allowing Gradle to manage the versions and share them across both
build and runtime environments.

build.gradle

@@ -19,7 +19,7 @@ ext {
 }
 
 mainClassName = 'com.webcodepro.applecommander.ui.AppleCommander'
-version '1.3.6-BETA'
+version "${version}"
 
 // Disable default JAR creation
 jar {
@@ -33,7 +33,9 @@ tasks.withType(Javadoc) {
 tasks.withType(Jar) {
     manifest {
         attributes 'Main-Class': 'com.webcodepro.applecommander.ui.AppleCommander'
-    } 
+        attributes 'Implementation-Title': 'AppleCommander',
+                   'Implementation-Version': version
+    }
 	from('LICENSE', 'CONTRIB', 'TODO', 'VERSIONS')
 }
 

gradle.properties

@@ -0,0 +1,4 @@
+# Universal AppleCommander version number.  Used for:
+# - Naming JAR file.  
+# - The build will insert this into a file that is read at run time as well.
+version=1.4.0-BETA

src/main/java/com/webcodepro/applecommander/ui/AppleCommander.java

@@ -40,8 +40,13 @@ import com.webcodepro.applecommander.util.TextBundle;
  * @author Rob Greene
  */
 public class AppleCommander {
-	public static final String VERSION = "1.4.0-BETA"; //$NON-NLS-1$
+	public static final String VERSION;
 	private static TextBundle textBundle = UiBundle.getInstance();
+	
+	static {
+		VERSION = AppleCommander.class.getPackage().getImplementationVersion();
+	}
+	
 	/**
 	 * Launch AppleCommander.
 	 */