amber-demo branch

[Aleksey Shipilev]

I see Vincent closed amber-demo branch here:
  http://hg.openjdk.java.net/amber/amber/rev/e5d0f86d1b66

Was that intentional? If so, is there a branch that can be built from to have previews of most of
the Amber work? Or, are users expected to build the particular feature branches now? Asking because
this used to build amber-demo, what to replace it with?
  https://builds.shipilev.net/openjdk-amber/

Thanks,
-Aleksey