Enhancements:
-------------

* Consolidate package metadata from extra.json and noarch.json into package_metadata.json #1535 #1539
* finalize paths.json, (formerly files.json), which supersedes the older separate files for tracking file data #1535
* Support output of multiple packages from one recipe #1576
* Support output of wheels #1576
* Add ``--prefix-length`` to conda-build.  This allows one to set the prefix length manually.  It should be used sparingly, preferring creation of a temporary folder on non-encrypted locations, and setting ``--croot`` to that temporary folder.  #1579
* Add ``--no-prefix-length-fallback`` option to conda-build, to fail builds that encounter short prefixes, rather than falling back to the short prefix #1579
* Change CRAN-skeleton to follow conda-forge style #1596

Bug fixes:
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* Rework locks to be more robust #1540
* Call make_hardlink_copy on Windows to prevent conda failures #1575
* Delete the work folder before running the test suite.  Exposes faulty links to source files more easily.  #1581
* Add support for Python 3.6 in selector expressions #1592
* Don't try to compile pyc files when python is not installed in the build env #1593
* Fix a function call leading to corrupted meta.yaml output #1589
* Fix logger to be package-local.  Fixes logger output not showing up.  #1583
* Disallow leading periods in package version  #1594
* Fix reference to undefined need_source_download #1595
* Disallow - in feature names, to avoid conflicts with conda's handling of package names #1600