Merge services-central into mozilla-central

browser/base/content/sync/notification.xml

browser/installer/removed-files.in

services/Makefile.in

services/common/Makefile.in

services/common/async.js

services/common/log4moz.js

services/common/observers.js

services/common/preferences.js

services/common/rest.js

services/common/services-common.js

services/common/stringbundle.js

services/common/tests/Makefile.in

services/common/tests/unit/head_global.js

services/common/tests/unit/head_helpers.js

services/common/tests/unit/test_async_chain.js

services/common/tests/unit/test_async_querySpinningly.js

services/common/tests/unit/test_load_modules.js

services/common/tests/unit/test_log4moz.js

services/common/tests/unit/test_observers.js

services/common/tests/unit/test_preferences.js