document camliRoot

Change-Id: Iccad2ed4f3c6b29fcd95377d2cf385e7015bb9a9
search: don't default to describe depth 4 anymore

Should no longer be necessary, and actually harmful often.

But this might break something. I can't find anything, though. We'll see.

Change-Id: I2b798a893100031b26251b0de7fa31ea5c4774d8
importer: linkify blobrefs, and start of automatic recurring importing

Change-Id: Ia172fe3e1cf762d328ad8a1886f545b4885337b0
Merge branch 'master' of https://camlistore.googlesource.com/camlistore
importer: more work on regular background importing

Does it once on start-up now. But not regularly.

Change-Id: I4300e396ca389f7c03f5c5e3042d44ede0621367
Merge "document camliRoot"
Rewrite Picasa importer for the new Importer API

Reorganizes some common things with Foursquare.

Needs thorough review: several FIXMEs and TODOS included!

Change-Id: I0789f4732412aa559078ec2c6b6797925ab8cd05