Bug fixes: ---------- * fix import tests being run multiple times #2892 * add creative commons as a license family (used to be classified OTHER) #2893 * handle empty packages in checks for duplicated files across subpackages #2894 * set PYTHON and other language path vars based on presence in build/host reqs, rather than binary file in either env. Allows usage of PYTHON and friends in meta.yaml vars. #2895 * fix entry points incorrecty pointing at build prefix (instead of host), leading to prefix replacement failing #2895 * fix merge_build_host functionality. Adding an empty host section now forces build and host to be split. #2896 Contributors: ------------- * @msarahan * @scopatz