Simplified Members class.

Completely removed the unused sorting functionality.

Removed the @root variable.  Only local variable used inside create().
Generalized the logic in add_class and moved it entirely into create().

create() now returns array.  The surrounding hash is added inside App.

Renamed expandable_desc() to short_desc() - nothing expandable in it.

Few more small variable renames.

Replaced comments with more accurate ones.