clarity on branches and Hive/Tez versions

[gregrahn]

Can you provide some clarity about what branch should be used for what version of Hive/Tez?

The hive13 branch README.md references testbench.settings but the file is init.settings in that branch. That settings file also sets hive.execution.engine=tez.

The master branch uses testbench.settings and has a second file, not in the README - testbench-withATS.settings, but those settings use hive.execution.engine=mr.