Change max from parameter to instance variable

[wakfi]

I'm don't think a check at the top on max is necessary to enforce it's consistency, but seeing how blatantly unchanging it was I realized that it would be better as an instance variable than a parameter being carried by the function. If you believe it's necessary to have safety check it that's fine, go ahead and add it, but to me it just seemed like an unnecessary extra operation that gets carried at factorial timescale.
I also noticed that in the sort checking portion when sorted is false and a call is made to this.bogoIsSorted, if it returned true the false sorted would still be returned which means the sort would be rechecked all the way up the function stack. I've changed the return to true to resolve this, as returning there means it is sorted.
Thanks for taking a look at this!