Update hpple.
Leper's Colony networking, parsing, and viewing.

closes #139
Show Leper's Colony as a pseudo-forum.

It's not important enough to be its own tab. Not sure I like it at the bottom
of the Forums list, but not sure where else to put it.
Leper's Colony dark mode.
Don't show the same ban twice.

Without this deduplication, the following can happen:

1. Load first page. Note last ban on page.
2. Meantime, someone new gets banned.
3. Load second page. First ban on page 2 is the last ban on page 1.
4. Enjoy reading the same ban twice.

It's not a big deal, but it looks really stupid.
Thread tag UIImages get right scale.

They're bundled in the app as @2x images, but without the @2x in the filename
(since we use the filename for other things), so we need to manually set the
scale.
Don't error out making imageless tab items.
Quiet Xcode error on category method thinger.
Remove unnecessary TODO.