Shortbread

The goal of this release is changing to a strict Jinja2 environment, paving the way to more awesome in the future, as well as adding support for Jinja2 extensions.

New Features:

• Added support for Jinja2 extension support, thanks to @hackebrot (#617).
• Now raises an error if Cookiecutter tries to render a template that contains an undefined variable. Makes generation more robust and secure (#586). Work done by @hackebrot (#111, #586, #592)
• Uses strict Jinja2 env in prompt, thanks to @hackebrot (#598, #613)
• Switched from pyyaml/ruamel.yaml libraries that were problematic across platforms to the pure Python poyo library, thanks to @hackebrot (#557, #569, #621)
• User config values for cookiecutters_dir and replay_dir now support environment variable and user home expansion, thanks to @nfarrar for the suggestion and @hackebrot for the PR (#640, #642)
• Add jinja2-time as default extension for dates and times in templates via {% now 'utc' %}, thanks to @hackebrot (#653)

Bug Fixes:

• Provided way to define options that have no defaults, thanks to @johtso (#587, #588)
• Make sure that replay.dump() and replay.load() use the correct user config, thanks to @hackebrot (#590, #594)
• Added correct CA bundle for Git on Appveyor, thanks to @maiksensi (#599, #602)
• Open HISTORY.rst with utf-8 encoding when reading the changelog, thanks to @0-wiz-0 for submitting the issue and @hackebrot for the fix (#638, #639)
• Fix repository indicators for private repository urls, thanks to @habnabit for the fix (#595) and @hackebrot for the tests (#655)

Other Changes:

• Set path before running tox, thanks to @maiksensi (#615, #620)
• Removed xfail in test_cookiecutters, thanks to @hackebrot (#618)
• Removed django-cms-plugin on account of 404 error, thanks to @mativs and @pydanny (#593)
• Fixed docs/usage.rst, thanks to @macrotim (#604)
• Update .gitignore to latest Python.gitignore and ignore PyCharm files, thanks to @audreyr
• Use open context manager to read context_file in generate() function, thanks to @hackebrot (#607, #608)
• Added documentation for choice variables, thanks to @maiksensi (#611)
• Set up Scrutinizer to check code quality, thanks to @audreyr
• Drop distutils support in setup.py, thanks to @hackebrot (#606, #609)
• Change cookiecutter-pypackage-minimal link, thanks to @kragniz (#614)
• Fix typo in one of the template's description, thanks to @ryanfreckleton (#643)
• Fix broken link to _copy_without_render in troubleshooting.rst, thanks to @ptim (#647)
• Added more cookiecutter templates to the mix:
• cookiecutter-pipproject by @wdm0006 (#624)
• cookiecutter-flask-2 by @wdm0006 (#624)
• cookiecutter-kotlin-gradle by @thomaslee (#622)
• cookiecutter-tryton_ by @cedk (#631)
• django-starter by @tkjone (#635)
• django-docker-bootstrap by @legios89 (#636)
• cookiecutter-mediawiki-extension by @JonasGroeger (#645)
• cookiecutter-django-gulp by @valerymelou (#648)