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
{
		return getSlot( COMPONENT_SLOT );
	}
	/**
	 * Returns the name of the tool that created the design.
	 * 
	 * @return the name of the tool
	 */
	public String getCreatedBy( )
	{
		return getStringProperty( CREATED_BY_PROP );
	}
	/**
	 * Returns a slot handle to work with the data sets within the report. Note
	 * that the order of the data sets within the slot is unimportant.
	 * 
	 * @return A handle for working with the data sets.
	 */
	public SlotHandle getDataSets( )
	{
		return getSlot( DATA_SET_SLOT );
	}
	/**
	 * Returns a slot handle to work with the data sources within the report.
	 * Note that the order of the data sources within the slot is unimportant.
	 * 
	 * @return A handle for working with the data sources.
	 */
	public SlotHandle getDataSources( )
	{