Bug 152828 Add the projectFolder property on module
When user doesn't set the resource folder path in designer, there should be a default working path for Birt to manage the report design and find the related resources. A new property should be added on Module: name: projectFolder type:URL This property only can be given from the open design method from session but should not be set after the module initialized. Concern about the backward compatiblity issue, a new method will be added. Open design with a config argument.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* @param name
	 *            the image name
	 * @throws SemanticException
	 *             if the image is not found.
	 * @deprecated
	 */
	public void dropImage( String name ) throws SemanticException
	{
		PropertyHandle propHandle = this.getPropertyHandle( IMAGES_PROP );
		int pos = findImagePos( name );
		if ( pos < 0 )
			throw new PropertyValueException( getElement( ), propHandle
					.getPropertyDefn( ), name,
					PropertyValueException.DESIGN_EXCEPTION_ITEM_NOT_FOUND );
		propHandle.removeItem( pos );
	}
	/**
	 * Drops a translation from the design.
	 * 
	 * @param resourceKey
	 *            resource key of the message in which this translation saves.
	 * @param locale
	 *            the string value of the locale for a translation. Locale
	 *            should be in java-defined format( en, en-US, zh_CN, etc.)
	 * @throws CustomMsgException
	 *             if <code>resourceKey</code> is <code>null</code>.
	 * @see #getTranslation(String, String)
	 */
	public void dropTranslation( String resourceKey, String locale )
			throws CustomMsgException