pkg/schema: Fix camput panic on non-utf8 filenames or symlink targets.

Also implement the relevant integration tests for camput and camget.

Depends on CL 2216.

Change-Id: I3f541efd4e583674e9817473292fa3de8a3cdabc
Import places and checkins from foursquare.

Change-Id: Ida2e411821f48a88212856398f5fe94caf7acd75
Merge "Import places and checkins from foursquare."
Added some icons for checkins and venues.

Change-Id: I4bfc5b7a8e099643c159ee6cb2532c71b0e62159
website: add foursquare importer to 0.8 notes

Change-Id: If91d9b9332e8234783de17bd7a25e0a9f6813976
Merge branch 'master' of https://camlistore.googlesource.com/camlistore