Conda

Improvements
* use cPickle in place of pickle for repodata (4717)
* ignore pyc compile failure (4719)
* use conda.exe for windows entry point executable (4716, 4720)
* localize use of conda_signal_handler (4730)
* add skip_safety_checks configuration parameter (4767)
* never symlink executables using ORIGIN (4625)
* set activate.bat codepage to CP_ACP (4558)

Bug Fixes
* fix 4777 package cache initialization speed (4778)
* fix 4703 menuinst PathNotFoundException (4709)
* ignore permissions error if user_site can't be read (4710)
* fix 4694 don't import requests directly in models (4711)
* fix 4715 include resources directory in recipe (4716)
* fix CondaHttpError for URLs that contain '%' (4769)
* bug fixes for preferred envs (4678)
* fix 4745 check for info/index.json with package is_extracted (4776)
* make sure url gets included in CondaHTTPError (4779)
* fix 4757 map-type configs set to None (4774)
* fix 4788 partial package extraction (4789)

Non-User-Facing Changes
* test coverage improvement (4607)
* CI configuration improvements (4713, 4773, 4775)
* allow sha256 to be None (4759)
* add cache_fn_url to exports (4729)
* add unicode paths for PY3 integration tests (4760)
* additional unit tests (4728, 4783)
* fix conda-build compatibility and tests (4785)

Improvements
* resolve 4636 environment variable expansion for pkgs_dirs (4637)
* link, symlink, islink, and readlink for Windows (4652, 4661)
* add extra information to CondaHTTPError (4638, 4672)

Bug Fixes
* maximize requested builds after feature determination (4647)
* fix 4649 incorrect assert statement concerning package cache directory (4651)
* multi-user mode bug fixes (4663)

Non-User-Facing Changes
* path_actions unit tests (4654)
* remove dead code (4369, 4655, 4660)
* separate repodata logic from index into a new core/repodata.py module (4669)

Improvements
* prepare conda for uploading to pypi (4619)
* better general http error message (4627)
* disable old python noarch warning (4576)

Bug Fixes
* fix UnicodeDecodeError for ensure_text_type (4585)
* fix determination of if file path is writable (4604)
* fix 4592 BufferError cannot close exported pointers exist (4628)
* fix run_script current working directory (4629)
* fix pkgs_dirs permissions regression (4626)

Non-User-Facing Changes
* fixes for tests when conda-bld directory doesn't exist (4606)
* use requirements.txt and Makefile for travis-ci setup (4600, 4633)
* remove hasattr use from compat functions (4634)

Bug Fixes
* fix attribute error in add_defaults_to_specs (4577)

Improvements
* remove .json from pickle path (4498)
* improve empty repodata noarch warning and error messages (4499)
* don't add python and lua as default specs for private envs (4529, 4533)
* let default_python be None (4547, 4550)

Bug Fixes
* fix 4513 null pointer exception for channel without noarch (4518)
* fix ssl_verify set type (4517)
* fix bug for windows multiuser (4524)
* fix clone with noarch python packages (4535)
* fix ipv6 for python 2.7 on Windows (4554)

Non-User-Facing Changes
* separate integration tests with a marker (4532)

Improvements
* improve repodata caching for performance (4478, 4488)
* expand scope of packages included by bad_installed (4402)
* silence pre-link warning for old noarch (4451)
* add configuration to optionally require noarch repodata (4450)
* improve conda subprocessing (4447)
* respect info/link.json (4482)

Bug Fixes
* fix 4398 'hard' was used for link type at one point (4409)
* fixed "No matches for wildcard '$activate_d/*.fish'" warning (4415)
* print correct activate/deactivate message for fish shell (4423)
* fix 'Dist' object has no attribute 'fn' (4424)
* fix noarch generic and add additional integration test (4431)
* fix 4425 unknown encoding (4433)

Non-User-Facing Changes
* fail CI on conda-build fail (4405)
* run doctests (4414)
* make index record mutable again (4461)
* additional test for conda list --json (4480)