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/core/Module.java
setID( getNextID( ) );
		addElementID( this );
		
		nameManager = new NameManager( this );
		versionMgr = new VersionControlMgr( );
	}
	/**
	 * Returns the design session that represents the designs that the user has
	 * open and user preferences.
	 * 
	 * @return the design session
	 */
	public DesignSession getSession( )
	{
		return session;
	}
	/**
	 * Finds a shared style in this module itself.
	 * 
	 * @param name
	 *            Name of the style to find.
	 * @return The style, or null if the style is not found.
	 */
	public StyleElement findNativeStyle( String name )
	{
		return (StyleElement) nameSpaces[STYLE_NAME_SPACE].getElement( name );
	}
	/**
	 * Finds a shared style in this module and its included modules.