Added room annotations which can be shown and hidden via triggers with t...

...he predefined triggers show/hideFirstFloorRoomAnnotations and show/hideSecondFloorRoomAnnotations.

Acceptance test:

1) Load a scenario and verify that the room annotations are visible.

2) Open JS console and call startTrigger() with the following string arguments, verifying that the appropriate room annotations are shown/hidden.

showFirstFloorRoomAnnotations
hideFirstFloorRoomAnnotations
showSecondFloorRoomAnnotations
hideSecondFloorRoomAnnotations