(14-May-2020): Drop PY3.5 & OrderedDict, fix null-check np-arrays

• DROP PY3.5 for it has no ordered dictionaries

  • replace the use of OrderedDict with vanilla (PY3.6) dicts.

• FIX(pandel): treat np-arrays as booleans by checking their size, recommended
  in numpy/numpy#9583 <https://github.com/numpy/numpy/issues/9583>_,
  to handle np.arrays's future boolean behavior (yet deprecated).

(5-Apr-2020): Auto-default Pandel

• FEAT(PANDEL): support auto defaulting/removing nulls with jsonschema validation.
• FIX(pandel): up-to-date patches to jsonschema for traversing pandas
  (see Julian/jsonschema#675)
• FEAT(CI): drop Python-3.5, test evenly, including Python-3.8.
• FEAT(build, doc): + [all] pip-extras (identical to [dev]); document available
  pip-extras in Quickstart section.
• enh(CI): Pytest-ize travis & appveyor scripts.
• enh(build): ignore folder when black-formatting, to eradicate delays when pre-commiting.
• fix(xleash.TC): up-to-date pyeval msg in a TC.
• enh(site): drop RTD mock hacks; fix xlwings intersphinx url.

(28-July-2019): xleash for pandas 0.25+

• fix xleash for pandas 0.25+ (19-July 2019).
• Pstep:
  • enh: rename cstor 2nd arg from _proto_or_pmod --> maps and allow
    to pass a sequence of 2-tuples to define mappings.
  • feat: accept multiple tags at once.

18-June-2019: DROP PY2, jsonschema 2-->3.x, modernize build

• Drop support for Python 2.7 & 3.4, which covers 95% of 2018 Python-3 installations
  (84% of Pythons in total)
• Use latest jsonschem(draft7) for PandelVisitor, using jsonschema lib,
  bringing its lower-bound from 2.x.x --> 3.0.0.
• Fix asteval xleash filter to work correctly with latest version
  using usersym table for context-variables (were missing those).
• Fix #13: ensure_filename() util were duping filename's file-extension
  if was given the same.
• Build & dev-dependencies enhancements.
• Make all TCs to pass in both CIs for linux & Windows.
• Suport PyTest for launching tests - nosetest is still used in CIs,
  an includes coverage also.
• style: auto-format python files with black opinionated formatter
  using pre-commit hooks framework.
• Drop bloated documentation sections about installation and
  cmdline-tools that never existed.
• Note: v0.3.0 were missing low-boundary on jsonschema >=3.

29-May-2018: reboot wltp

• Fix py36 "nested regex" warning on xleash._parse module.
• Pin jsonschema <3 since _types has been dropped.
• Updates to setup.py, dependencies & build-scripts.
• VSCode files & dev plugins.

23-Aug-2018: Stable release for splitted co2mpas+dice2 Aug-2018

--((- Ante-released in GitHub on May 2019 -))--

Released just to move easygui dependency to (renamed from xlwings-->) [excel] extras, just for co2mpas summer release.

v0.2.4.post1 had unwanted WIPs.

21-Mar-2017: xleash fix

--((- Ante-released in GitHub on May 2019 -))--

• fix(xleash.io, #12): sheet margins failed with > 32bit num of rows/cols

25-Feb-2017: DROP Python2

--((- Ante-released in GitHub on May 2019 -))--

v0.2.3 (25-Feb-2017)

• chore(travis): stop PY2 builds, reduce use of future lib
• fix(xleash, #10): numpy-warning raised bc diffing booleans

2-Dec-2016: "Stop" release

--((- Ante-released in GitHub on May 2019 -))--

• remove unused features: doit, tkUI.
• travis-test on CONDA-->"standard" py; test also unde4r PY36-dev.

2-Nov-2016: "Really?" release

--((- Ante-released in GitHub on May 2019 -))--

• xleash:

  • Plugins for backends and filters.

  • Packaging now supports 3 extras:

    • xlrd for the typical backend plugin,
    • xlwings for the new backend, excel-utils & tests,
    • pandas for filters plugins.

  • FIX & rename pandas-filter series --> sr - did not return a Lasso.

  • Always convert xl-ref paths a "local" or "remote" urls to facilitate
    backends & use their url.params instead of filter opts.

  • Rename io._sheets --> io.backend.

• xlutils, deps: Upgraded to xlwings-0.9.x released Aug/2/2016
  (see migration guide <http://docs.xlwings.org/en/stable/migrate_to_0.9.html>_)

  • Dropped util-functions (provided by now xlwings) or renamed:
    • xlutils.get_active_workbook()
    • xlutils.get_workbook()
    • tests._tutils.xw_Workbook() --> tests._tutils.xw_no_save_Workbook()

• utils: Add more file/str functions from co2mpas-sampling
  (which/where, convpath, convert to/from came_case, publicize norm/abs paths)

• Unfortunately, Travis were down during the release (actually logs did not work),
  so TCs fail :-(