TRIV DOC: mention location of test suite in README.
TRIV DOC: mention location of test suite in README.

pombredanne/nTLP,necozay/tulip-control,pombredanne/nTLP,tulip-control/tulip-control,tulip-control/tulip-control,necozay/tulip-control,pombredanne/nTLP,necozay/tulip-control,necozay/tulip-control,tulip-control/tulip-control,tulip-control/tulip-control,necozay/tulip-control