Improving the wikipedia plugin a bit

Made interwiki links (like https://en.wikipedia.org/wiki/Wiktionary:Ball) at the very least post the link, instead of just failing.

Judging sentence ends by punctuation is too prone to errors (for example, instead of "King Kong vs. Godzilla (キングコング対ゴジラ Kingu Kongu Tai Gojira?) is a 1962 Japanese Science fiction Kaiju film produced by Toho Studios." we'd get "King Kong vs.") and oftentimes a single sentence is not enough.
Now we're getting the whole lead, and truncating it if over 200 characters.