omindex: add support for indexing apple keynote presentations

[Olly Betts]

Keynote presentations (.key) are another XML-in-a-zip-container format, and so we can handle them easily.

There's a thread with the details here:

​http://thread.gmane.org/gmane.comp.search.xapian.general/9446

[Olly Betts]

It seems likely the other iWork document formats have the same structure, so we can probably handle those too.

[James Aylett]

Sample iWork Pages document (CC By-NC)

[James Aylett]

iWork Keynote example (CC By-NC)

[James Aylett]

Two attachments under fairly liberal Creative Commons licenses added for testing purposes. The Keynote document has speaker notes as well as on-screen text; if necessary I can create a PDF export or similar including them for comparison, but I'd hope it's pretty obvious.

[Olly Betts]

Thanks. The "NC" bit means we can't include these as part of a testsuite, sadly, but they'll be useful for manual testing during development at least.

[James Aylett]

Actually, the Keynote example I can license as CC By.

[Olly Betts]

james: The .pages file is just 204 zero bytes - I think it must have been corrupted somewhere along the line. Could you check and reupload if you have a good copy?

[Olly Betts]

patch to add iwork extension -> mimetype mappings

[James Aylett]

Sample iWork Pages document (CC By-NC)

[James Aylett]

Sample iWork Pages document (CC By-NC)

[Olly Betts]

This can just be slotted into a 1.4.x release.

[Olly Betts]

This was implemented in 1.4.8 (using libetonyek).