Add separate elevator room the player enters before arriving at a new floor

[kerrielake]

Currently, when the player wants to go to a new floor, they press the button in the directory and are instantly taken there. It would be great if we could change it so that after selecting the floor button, the elevator opens up for the player to enter. They would then be in the elevator interior for a short period before exiting on the desired floor.

It would be a cool bonus if while in the elevator there was a slight screen-shaking animation too while it is moving!

[MarvelProgramming]

For this, I imagine we could pull from the decontamination map in the Javascript Test Labs. It's doing a few of the things mentioned here, minus the screen-shake, freezing the player, and level transitioning. Are there existing sounds we could use for this too?

[rmkubik]

I'm going to remove this from the current milestone so we can focus on API Academy features. This would still be a nice feature for us to work on in the future so I'll leave the issue.