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
}
	/**
	 * Sets the module file name. This method is only called by module reader,
	 * it's illegal to be called for other purpose.
	 * 
	 * @param newName
	 *            the new file name. It may contain relative/absolute path
	 *            information. But this name must include the file name with the
	 *            filename extension.
	 */
	public void setFileName( String newName )
	{
		fileName = newName;
	}
	/**
	 * Sets the UTF signature of this module file.
	 * 
	 * @param signature
	 *            the UTF signature of the module file.
	 */
	public void setUTFSignature( String signature )
	{
		this.signature = signature;
	}
	/**
	 * Gets the UTF signature of this module file.
	 * 
	 * @return the UTF signature of the module file.
	 */
	public String getUTFSignature( )