Changed 2.0.0-alpha1 to alpha3 in offline repo

Normally we keep the most recent version too, but
since we didn't ever update this for alpha2, which hopefully
everyone is using, not bothering to keep alpha1 this time.

For alpha4, consider keeping alpha3 too.

Change-Id: I4fcc5857b541ad24be744813ffee78715c565ae7
81 files changed