Missing cursor attribute 'description'

[bbaker1229]

Other python database packages (including cx_Oracle) include a method to get the column names which involves using cursor.description. It looks like the object 'description' is not available for cx_Oracle_async for the AsyncCursorWrapper. Is there a different method for returning the column names when using this package?

[bbaker1229]

#20 Please review the added description method.