make-it-so.el (make-it-so): account for `wdired-mode'
make-it-so.el (mis-select-method): add

* make-it-so.el (make-it-so): Dispatch according to `mis-select-method'.
  (mis--helm): New function.
  (mis--ido): New function.

Fixes #1.
make-it-so.el (mis-recipes-by-ext): handle null extensions