Merge branch 'animate_global' into 'master'

FF_ANIMATE additions: globally synced animations

FF_GLOBALANIM = makes the animation synced to the level's timer, so all objects will display the same frame at the same time

![](https://dl.dropboxusercontent.com/u/3518218/22/srb22-0008.gif)

I mean, doesn't that look so much prettier?

There's also some changes to FF_MIDDLESTARTCHANCE (FF_ANIMATE behavior was split due to not acting consistent between that and SPR2 behavior).

See merge request !46