Features:
 * use posix metapackage for cran skeleton packaging (#956)

Bug fixes:
 * fix output of package paths (extra output was breaking tools).  Add tests. (#950, #960)
 * change default of no_download_source in build.py (for compatibility with conda-build-all) (#950)
 * fix regression in [] being confused for selectors (#957)

Contributors:
 * @mingwandroid
 * @msarahan
 * @stuarteberg