Bug 37197 Basepath for relative pathes in JAR-exporter
The basepath for the JAR-exporter is the eclipse-install-directory. I prefer it to be the root of the project (the description is saved in), so that relative pathes end inside the project. Now: <jardesc> <jar path="workspace/projectdir/jar.jar"/> Desired: <jardesc> <jar path="jar.jar"/> Reason: To make the jardesc-files portable for shared projects
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/jarpackager/JarPackageData.java
* @return a JarWriter
	 * @see JarWriter
	 */
	public JarWriter createJarWriter(Shell parent) throws CoreException {
		return new JarWriter(this, parent);
	}
	
	/**
	 * Creates and returns a JarExportRunnable.
	 *
	 * @param	parent	the parent for the dialog,
	 * 			or <code>null</code> if no questions should be asked and
	 * 			no checks for unsaved files should be made.
	 * @return a JarExportRunnable
	 */
	public IJarExportRunnable createJarExportRunnable(Shell parent) {
		return new JarFileExportOperation(this, parent);
	}
	
	/**
	 * Creates and returns a JarExportRunnable for a list of JAR package
	 * data objects.
	 *
	 * @param	jarPackagesData	an array with JAR package data objects
	 * @param	parent			the parent for the dialog,
	 * 							or <code>null</code> if no dialog should be presented
	 */
	public IJarExportRunnable createJarExportRunnable(JarPackageData[] jarPackagesData, Shell parent) {
		return new JarFileExportOperation(jarPackagesData, parent);
	}