[aquarium]: Added placeholder images
[aquarium]: Implemented a new CameraRefresher class which abstracts out refreshing / timestamp / camera switching. Added several callbacks. Etc.
[aquarium]: Implemented TimerDisplayer class, to easily display the timer, show a different color depending on the time left, and auto count-down if necessary
[aquarium]: Added refreshing gifs
[aquarium]: Improved the CameraRefresher control to support non-automatic refreshing, improved refreshing display, etc.
[aquarium]: Refactored out some classes such as the CameraRefresher and the TimerDisplayer into its own widgets.js file
[aquarium]: Added overlay-back and overlay-front support
Show the link to the incubator
Add a message indicating that the problem of not having ZSI is not too bad
Merge master into move_schedulers_to_db
Add indexes for better performance
Add panel to see only the usage of your users