HomeButtonViewModel uses deprecated camera functionality

[kring]

The direction and up parameters to Camera.flyTo have been deprecated but they're still used in HomeButtonViewModel:

https://github.com/AnalyticalGraphicsInc/cesium/blob/master/Source/Widgets/HomeButton/HomeButtonViewModel.js#L58

[mramato]

This is already fixed in the entity-zoom branch. But we can leave this open until its in master.

[emackey]

I know we're swamped, but it seems like very bad form to ship a release that prints the deprecation warning for users that click Home. The average user won't know why they're seeing the message, and it makes many Sandcastle demos appear broken when you look at the console.

[mramato]

It's not going to ship, entity-zoom (and related branches) will be going into master tomorrow

[kring]

Ok, thanks guys!

[mramato]

Fixed in #2315