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
* <p>
	 * This should only be used if the JAR itself is sealed.
	 * </p>
	 * 
	 * @return an array of <code>IPackageFragment</code>
	 */
	public void setPackagesToUnseal(IPackageFragment[] packagesToUnseal) {
		fPackagesToUnseal= packagesToUnseal;
	}
	/**
	 * Tells whether a description of this JAR package must be saved
	 * to a file by a JAR description writer during the export operation.
	 * <p>
	 * The JAR writer defines the format of the file.
	 * </p>
	 * 
	 * @return	<code>true</code> if this JAR package will be saved
	 * @see #getDescriptionLocation()
	 */
	public boolean isDescriptionSaved() {
		return fSaveDescription;
	}
	
	/**
	 * Set whether a description of this JAR package must be saved
	 * to a file by a JAR description writer during the export operation.
	 * <p>
	 * The format is defined by the client who implements the
	 * reader/writer pair.
	 * </p>