doc: add TSC members from the combined project

doc: add TSC members from the combined project

These members were collaborators on the old joyent/node repo prior to
convergence of the Node.js and io.js projects under the Node
Foundation. This updates our list to represent that they are now also
part of the TSC (Technical Steering Committee), which was previously
known as the io.js TC.

PR-URL: https://github.com/nodejs/io.js/pull/2085
Reviewed-By: Mikeal Rogers <mikeal.rogers@gmail.com>
Reviewed-By: Rod Vagg <rod@vagg.org>
Membership changes also previously reviewed by many more TSC & former
TC members in https://github.com/nodejs/io.js/pull/1710