[tz] 2016b is on GitHub

[Paul Eggert]

Given the urgency of the Haiti rule change in a few hours, I've prepared a new 
tz version 2016b. It is available at <https://github.com/eggert/tz> as commit 
70161f48bc212678c58490f7faabc286c90b2a05. Although this is intended to be the 
next release, published as usual, it can take a bit of time to turn the crank so 
I thought I'd give the mailing list a heads-up.

2016b does not incorporate all changes recently circulated. Notably it's missing 
historical changes for Russia contributed by Stepan Golosunov, which I haven't 
had time to proofread carefully. I'd like to get all this stuff fixed soon, 
although we may have to wait until the spring silly season is over.