[ANNOUNCE] New project committers: Jie-Kai Chang (400ping) and Ryan Huang (ryankert01)

[Guan-Ming Chiu]

I'm pleased to announce that Jie-Kai and Ryan have accepted our
invitation to become Mahout committers! Thank you both for your
contributions to the project. We're excited to have you on board in this
new role.

Welcome to the team!

Best
Guan-Ming