Add README and up versions to 1.0.0 for Tech Preview.

Change-Id: If7a832e6be688dba021b8ee801df5e2e67f591d1
Reviewed-by: Sami Makkonen <sami.makkonen@digia.com>
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>