Internal view lifecycle hooks for animation purposes

[robharper]

@seilund

@tchak, can you explain what went wrong with your PR Container view hooks by tchak · Pull Request #1198 · emberjs/ember.js · GitHub which definitely looks like the right direction to go?

If I could hazard a guess I’d say something related to this:

@seilund

Views that are animated will be frozen (i.e. no DOM changes can occur). This will avoid the issue where an outgoing view is changed since it’s controller changes its content. It will also improve FPS especially on mobile