Added alias characters options description

We came across a situation where we had to be insensitive to certain special characters in the search such as ' ' and '-'. Therefore, we would like to implement an option that would treat certain characters the same in the search. 

For example, I have an item that is called 'Oil Filter B-99'. I would like this item to be searchable by either entering 'B 99', 'B99' or 'B-99'.