Flight controller snaps from initial orientation

[pjcozzi]

If we start a flight with a horizon view, e.g., using the middle mouse, it first snaps to look straight down before entering the flight. Try the Fly to Los Angeles example in the Sandbox.

[bagnell]

Also, camera flight doesn't work in 2D (probably doesn't work in Columbus view either). See #73.

[pjcozzi]

Let's close this too when the flight branch comes in.

Will it work in 2D and Columbus view now?

[bagnell]

This is fixed in #282. Flights can also be created in 2D and Columbus view. We can close this when #282 is merged to master.