"Heuristica" WOFF in documentation is corrupted

[mernen]

The documentation pages are supposed to use a serif font named Heuristica for body text, but all browsers tested failed to render it.

Most browsers were silent, but Firefox gave me these two helpful console messages:

• downloadable font: incorrect file size in WOFF header (font-family: "Heuristica" style:normal weight:normal stretch:normal src index:1)
  source: http://doc.rust-lang.org/0.11.0/Heuristica-Regular.woff rust.css
• downloadable font: rejected by sanitizer (font-family: "Heuristica" style:normal weight:normal stretch:normal src index:1)
  source: http://doc.rust-lang.org/0.11.0/Heuristica-Regular.woff

Interestingly, Heuristica-Bold.woff is also damaged, but the two italic versions seem fine.

Additionally, the page style declares Helvetica Neue, Helvetica, Arial, sans-serif as fallbacks. Since Heuristica is a serif font, shouldn't we use serif fallbacks? (That said, the docs look fine with the sans fonts to me, I wouldn't mind keeping the current looks.)