[command] auto-update - clear and warmup cache thru cache:clear command
[command] fix by auto-update
add app/update script to run the auto-update command
[command] explicitly set world-writable cache dir
[command] auto-update - run cache:create-cache-class after cache warmup
better locking of front controller by auto-update
tweak comments
test stub for FileUpdater
fix sfb generation of books
[view] escape html in a content tag