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/SessionHandle.java
* @see org.eclipse.birt.report.model.metadata.ColorPropertyType
	 */
	public void setColorFormat( int rgbFormat ) throws PropertyValueException
	{
		session.setColorFormat( rgbFormat );
	}
	/**
	 * Returns the current application rgb color display preference. The return
	 * is one of the following constants defined in <code>ColorUtil</code>:
	 * 
	 * <ul>
	 * <li><code>INT_FORMAT</code>
	 * <li><code>HTML_FORMAT</code>
	 * <li><code>JAVA_FORMAT</code>
	 * <li><code>CSS_ABSOLUTE_FORMAT</code>
	 * <li><code>CSS_RELATIVE_FORMAT</code>
	 * </ul>
	 * 
	 * @return application rgb color display preference
	 * 
	 * @see #setColorFormat(int)
	 */
	public int getColorFormat( )
	{
		return session.getColorFormat( );
	}
	/**
	 * Sets the specified default value of style property.
	 * 
	 * @param propName