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
* Gets the library with the given location path in native level.
	 * 
	 * @param theLocation
	 *            the location path to find
	 * @return the library with the given location path if found, otherwise null
	 */
	public Library getLibraryByLocation( String theLocation )
	{
		return getLibraryByLocation( theLocation,
				IAccessControl.DIRECTLY_INCLUDED_LEVEL );
	}
	/**
	 * Gets the library with the given location path in given level.
	 * 
	 * @param theLocation
	 *            the location path to find
	 * @param level
	 *            the depth of the library
	 * @return the library with the given location path if found, otherwise null
	 */
	public Library getLibraryByLocation( String theLocation, int level )
	{
		
		if ( StringUtil.isBlank( theLocation ) )
			return null;
		
		
		List libraries = getLibraries( level );
		for ( int i = 0; i < libraries.size( ); i++ )
		{