Pyenv

* pyenv: Migrate project site from https://github.com/yyuu/pyenv to https://github.com/pyenv/pyenv
* python-build: Add PyPy2 5.7.0 (872, 868)
* python-build: Add PyPy3 5.7.0-beta (871, 869)
* python-build: Add CPython 3.6.1 (873)
* python-build: Add Pyston 0.6.1 (859)
* python-build: Change default mirror site URL from https://yyuu.github.io/pythons to https://pyenv.github.io/pythons
* python-build: Upgrade OpenSSL from 1.0.2g to 1.0.2k (850)

* pyenv: Fix fish subcommand completion (831)
* python-build: Add Anaconda2/Anaconda3 4.3.0 (824)
* python-build: Use CPython on GitHub as the source repository of CPython development versions (836, 837)
* python-build: Fix checksum verification issue on the platform where OpenSSL isn't available (840)

* python-build: Add CPython 3.5.3 (811)
* python-build: Add CPython 3.4.6 (812)
* python-build: Fix tar.gz checksum of CPython 3.6.0 (793)
* python-build: Jython installer workaround (800)
* python-build: Disable optimization (`-O0`) when `--debug` was specified (808)

* python-build: Add CPython 3.6.0 (787)

* python-build: Add CPython 2.7.13 (782)
* python-build: Add CPython 3.6.0rc2 (781)
* python-build: Add Anaconda 4.2.0 (774)
* python-build: Add Anaconda3 4.2.0 (765)
* python-build: Add IronPython 2.7.7 (755)

* python-build: Add PyPy 5.6.0 (751)
* python-build: Add PyPy3 3.5 nightlies (`pypy3.5-c-jit-latest` 737)
* python-build: Add Stackless 2.7.12 (753)
* python-build: Add Stackless 2.7.11
* python-build: Add Stackless 2.7.10
* python-build: Add Pyston 0.6.0
* python-build: Add CPython 3.6.0b4 (762)