fact?- sort of working close #109, add deprecation note close #114

midje-cascalog mostly works for midje 1.5 now.

tried a few solutions myself to no avail. so I just pasted @marick's solution in #109 for `fact?-`. still finicky though. for example, `(let [...] (fact?- ...))` still would not work.

glad to have added deprecation note for all `fact?-` forms. didn't use `defdeprecated` because of different signatures between old and new and doesn't work on a macro. so just hacked in a couple lines to `defmirror` instead as it's simplest.