/**
    Source a file relative to the callering script's directory.
	<p/>

    e.g. scripts A running in dir A sources script B in dir B.
	Script B can use this command to load additional scripts (data, etc.)
	relative to its own location (dir B) without having to explicitly know 
	its "home" directory (B).
	<p/>
	Note: this only works for files currently.

    @since bsh1.3
	@see source( file | URL );
*/
sourceRelative( String file )
{
    this.dir=dirname( getSourceFileInfo() );
    this.path=pathToFile( dir + File.separator + file ) .getAbsolutePath();
    return this.interpreter.source( path, this.caller.namespace );
}