* Adding initial unit test and Jenkins code.
Fixing scope of unit tests
Adding unit tests and files for CI
Fixing Jenkinsfile
* Removing typos from Jenkinsfile
* Making some fixes to the Jenkins file; temporarily disabling MPI
* Making corrections to Jenkinsfile
* Correcting dockerNodes entry in Jenkinsfile
* Fixed Jenkinsfile for CI
* Correcting Jenkinsfile for CI
* Updating README to include instructions on how to run unit tests.
Major rework to merge most of the changes from the NCCL internal
tests into the public ones
Added "-m <agg_iters>" operation aggregation option.
Data integrity checking is now much more performant at scale.
Startup times at scale are improved.
Test latency units are now displayed in usec.
Sylvain Jeaugey
Luke Yeager
Wenkai Du
Gilbert Lee
Stanley Tsang
David Addison