Remove calls to most goog.* functions defined in Closure.
Move watchdog.* objects into the apps_dev_tool namespace.

Continue the migration away from closure by using cr.define to export
the items into the proper namespace.  Since this requires adding an
extra level of indentation to the code, fix up line wraps where needed.
Also fix up comments that refer to "watchdog".
Move watchdog JavaScript files into the main js/ directory and drop prefix.
Add copyright statement to the activity*.js files.
Delete the Closure Library.  It is no longer needed.
work in progress
merge with upstream
implement realtime tab
correct a comment
Merge remote-tracking branch 'upstream/master' into spostman_realtime
register a cancelOverlay handler
reflect the comments
correct a lint error
Comment cleanups suggested by p-march.
Prefix type names with activityLogPrivate in comments where appropriate.
Merge remote-tracking branch 'origin/master' into closure

Conflicts (resolved manually):
	main.html
Merge remote-tracking branch 'upstream/master' into spostman_realtime
reflect the comments
implement start/pause clear buttons in realtime
merge with the most recent one