Index directories with "fileinfo", and use this to
find their name in a search request.

Fixes http://code.google.com/p/camlistore/issues/detail?id=79

Change-Id: I755afd8f52dbd2f8a48ba72bed0a6b0192d1dd71
App Engine: use an Entity Group per namespace index

Change-Id: I885b6093ff87f71cf032bf984eb2041f0705cf08
App Engine: index: implement Delete

Change-Id: I4ddf8656dd93094336d380cce9a92983baea502c
rename TODO

Change-Id: I544c7bb2db76fd67200b9d00bb2c8ea15bb8042c
index: typo and more logging

Change-Id: I814939ba7338eefb8ba919cada24feed8249d3dd
App Engine: use proper types + noindex in storage handler

Change-Id: I6f85086d89659b1cef9d9953627ff7e468b273e1
App Engine: the index works now, and everything seems to basically work!

yay.

Change-Id: Ib6c7983de4a81decf16389b5883726830fc4d9db