gitfs2 - the final syntax for repo

[chfw]

the follow-up PR for #302. Here is the updated and final syntax:

Here are the sample file::

    configuration:
      template_dir:
        - "git://github.com/moremoban/pypi-mobans.git!/templates"
        - local
      configuration: config.yml
      configuration_dir: "git://github.com/moremoban/pypi-mobans.git!/config"
    targets:
      - mytravis.yml: travis.yml.jj2
      - test.txt: demo.txt.jj2

The sumodule syntax is::

    configuration:
      template_dir:
        - "git://github.com/moremoban/pypi-mobans.git?submodule=true&branch=your_choice_or_default_branch_if_not_specified!/templates"
        - local

If you have reference instead of branch::

    configuration:
      template_dir:
        - "git://github.com/moremoban/pypi-mobans.git?submodule=true&reference=your_alternative_reference_but_not_used_together_with_branch!/templates"
        - local

And requires is now officially deprecated.

[codecov-io]

Codecov Report

Merging #312 into dev will decrease coverage by 0.98%.
The diff coverage is 89.47%.

@@            Coverage Diff             @@
##              dev     #312      +/-   ##
==========================================
- Coverage   98.78%   97.79%   -0.99%     
==========================================
  Files          61       59       -2     
  Lines        2882     2817      -65     
==========================================
- Hits         2847     2755      -92     
- Misses         35       62      +27

Impacted Files	Coverage Δ
moban/utils.py	97.29% <ø> (-0.21%)	⬇️
moban/definitions.py	100% <ø> (ø)	⬆️
moban/main.py	100% <ø> (ø)	⬆️
moban/deprecated/repo.py	63.82% <ø> (ø)
moban/mobanfile/__init__.py	99.25% <100%> (ø)	⬆️
tests/mobanfile/test_mobanfile.py	100% <100%> (ø)	⬆️
tests/test_engine.py	100% <100%> (ø)	⬆️
tests/test_utils.py	100% <100%> (ø)	⬆️
moban/constants.py	100% <100%> (ø)	⬆️
tests/test_definitions.py	100% <100%> (ø)	⬆️
... and 6 more

---

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[chfw]

Please give your feedback when it is going to be released then. The development needs to go forward.

[chfw]

@jayvdb , before PyFilesystem 2 take my PR, you can still give feedback so as to change its behavior.