Parse text spoilers page for multiple cards.

This page has more results and basically the same amount of
information, so let's parse it instead of the more limited,
image-laden pages.
Query the text spoiler by default.
Clean whitespace more effectively.
Remove result limitation message.

It's possible that text spoiler mode does have an upper limit on
results, but it appears to be absurdly high (at least 5000).
Merge branch 'parse-text-spoilers'