Release Kyuubi-v1.0.0

Hi All,

Kyuubi 1.0.0 is now released.

Major Improvements

1. Spark 3.0.1 Support (2x performance up)
2. Decouped Spark Driver from Kyuubi Server (A new future-proofing architecture)
3. All cluster manager types are supported (Yarn, k8s, Mesos, standalone, local)
4. Cluster mode supported
5. e.t.c

More detail at https://kyuubi.readthedocs.io/en/stable/overview/architecture.html

Thank you all~

Bests,

Kent Yao