RTL languages support

[fadykamal]

Ebooks like this one aren't supported
https://epub-samples.googlecode.com/files/regime-anticancer-arabic-20130327.epub
Are RTL language epub books will be supported soon ?

[rschroll]

Testing that sample on my webpage, I noticed two problems:

1. The title page did not display. This had nothing to do with rtl
   text, but was due to an error unzipping the epub. Upgrading zip.js
   fixed that.

2. Only the first page of a chapter is displayed; the rest are blank.
   I suspect this is actually a problem with Monocle, which actually lays
   things out, not with EFM, which is just responsible for feeding Monocle
   data. In this issue (components via Ajax and <iframe> joseph/Monocle#52),
   haniqassim notes the same problem, and there doesn't seem to have been
   any resolution. This may also be relevant:
   Vertical reading, and ebook with different direction joseph/Monocle#80.

(Actually, there's probably a third problem: the page turns are
backwards. But again, that's a problem with Monocle.)

I'll leave this open for now, since there's a chance that EFM will have
to do something special to pass RTL text to Monocle once Monocle
supports it.