FUSE: support renaming roots

Change-Id: I2acdd9a59e1b031b1a9d02d3cd07f7b9b16818a5
Merge "FUSE: support renaming roots"
make.go: don't build mattn/go-sqlite3 if sqlite3 isn't available

Tested with:
$ PKG_CONFIG_LIBDIR=/xx go run make.go

Change-Id: Idfc6bd703261e5bc39378c889d6f49cc4af017d1
Merge branch 'master' of https://camlistore.googlesource.com/camlistore
search: make is:pano be a bit wider.

Change-Id: I73a27b296a62d77bd1f8967a690a361f7aa4edde