Rituals

* Officially supported Python versions now 3.6 .. 3.8
* fix: Handle changed pypandoc API
* fix: Add auto-mode for project layout (close 12)
* Refactored setup.py access and added some poetry support
* new `release.shiv` task
* releasing: do early and explicit check for pex/shiv
* releasing: use sys.executable for subcalls
* releasing: support 'pex --windows'
* release.pex: handle 3.8 having no more 'm' ABI flag
* release.pex: write archive to dist/, not bin/
* release.pex: ignore any pure wheel (none-any) when it comes to dist renaming
* release.pex: filter out platform tags with a compatible Python ABI before renaming
* git tags: better error reporting when tag splitting fails
* docs: add source to watch dirs when using API docs
* SCM versions: only consider annotated tags, and exclude 'stable'
* tasks requirements: shiv and pex for releasing
* `upload_artifacts()` is now usable from outside a release task

* docs.upload: add 'git_path' as url variable
* docs.upload: fix for 'ssh://' git urls
* sdist: fixed MANIFEST omissions
* chg: Removed Python 2.7

> Juergen Hermann <jhweb.de> Tue, 16 Jul 2019 13:44:59 +0200

* new: 'docs.sphinx' and 'docs.upload' task (to PyPI/WebDAV/Artifactory)
* new: convenient control of 'sphinx-autobuild' daemon
* new: added 'test' namespace and 'tox' task
* new: 'release.pex' to create PEX artifacts
* new: optional inclusion of PyRun in PEX artifacts
* new: 'release.bump' to create unique development versions
* new: build a DEB package (new 'deb' task)
* new: 'devpi' namespace with a 'refresh' task
* new: added 'freeze' as a root task
* new: 'jenkins.description' to display project metadata in the Jenkins UI
* new: support for projects with 'py_modules'
* new: 'util.filesys' module with a 'pushd' helper
* new: 'fail' helper function in 'rituals.easy'
* new: 'with_root' param for FileSet.walk()
* chg: 'test.pytest' as the default in 'test' namespace
* chg: 'prep' renamed to 'release.prep'
* chg: added '--clean' option to 'test.tox', and 'clean --tox'
* chg: exclude SCM dirs from 'clean'
* chg: improved autoenv script
* chg: better HTTP error reporting for docs upload
* chg: more unit tests (still missing a lot)
* chg: Python 3.4 support
* chg: Python3 is now the workdir default
* fix: non-git workdirs are handled correctly in 'release.prep'
* fix: support for Invoke v1 (`ctask` rename)

- new: added 'release-prep' task
- new: added --skip-root to 'check', and checking './*.py' too
- new: 'dist' task automatically creates wheels if possible
- chg: better handling of 'build --docs'
- chg: added help for task parameters (closes 4)
- chg: warn about missing Sphinx docs (when '--docs' is provided)
- fix: get src package list for 'check' from 'project.packages'
- fix: use 'which' to look for 'py.test' binary (closes 2)