fix issue #304 fallback for bad wikipedia.org title suggestion

[hobson]

• Fix #304
• Fallback to original title if wikipedia.org suggest API returns a nonexistent page title or no suggestions
• Add BAD SUGGESTION warnings when Wikipedia.org suggests nonexsitent titles

[wlerin]

Not a contributor/maintainer, but that has way too many formatting changes to tell what you actually changed.

Edit: After some searching around and looking at the expected locations to be changed, I really don't see the point of this. The main problem isn't that suggestion sometimes (nearly always) returns bonkers "suggestions", it's that those take precedence over actual pages. A library that is meant to be incorporated into other programs (some of them non-interactive) spewing out a bunch of capital letters won't fix that.