Argument migration

Add a DSL to migrate options to different names, migrate them from either being manually passed or from tabs and print a warning telling users to use the new name. Also, migrate `wget` as an example.

CC @adamv @mistydemeo @jacknagel @tdsmith @asparagui for thoughts and review.
I was wrong, we can't use `delete` here since `options.is_a? Options` rather than an array. `-= [option]` will have to do.