Fix github-linguist statistics

[marcus7070]

CQ's current language statistics:

These changes will make it look like:

See my fork to see it in action.

The problem was a single Jupyter Notebook, github-linguist naively counts every line of code in that 5MB file. Moving it to the examples directory means github-linguist now classes it as documentation (not core code) and ignores it.

I also added a .gitattributes, which tells git to treat tests/testdata/* and *.ipynb as un-diff-able and not to change the line endings on those files. Doesn't fix any issue in particular, just seems like good practise.

[marcus7070]

If anyone is interested, here are the files github-linguist considers when calculating CQ's language statistics:

marcus> github-linguist --breakdown
99.97%  Python
0.02%   Shell
0.01%   Batchfile

Shell:
build-docs.sh
conda_build.sh

Python:
cadquery/__init__.py
cadquery/assembly.py
cadquery/contrib/__init__.py
cadquery/cq.py
cadquery/cq_directive.py
cadquery/cqgi.py
cadquery/occ_impl/assembly.py
cadquery/occ_impl/exporters/__init__.py
cadquery/occ_impl/exporters/amf.py
cadquery/occ_impl/exporters/assembly.py
cadquery/occ_impl/exporters/dxf.py
cadquery/occ_impl/exporters/json.py
cadquery/occ_impl/exporters/svg.py
cadquery/occ_impl/exporters/utils.py
cadquery/occ_impl/geom.py
cadquery/occ_impl/importers.py
cadquery/occ_impl/jupyter_tools.py
cadquery/occ_impl/shapes.py
cadquery/occ_impl/solver.py
cadquery/plugins/__init__.py
cadquery/selectors.py
cadquery/units.py
cadquery/utils.py
setup.py
tests/__init__.py
tests/test_assembly.py
tests/test_cad_objects.py
tests/test_cadquery.py
tests/test_cqgi.py
tests/test_exporters.py
tests/test_importers.py
tests/test_jupyter.py
tests/test_selectors.py
tests/test_workplanes.py

Batchfile:
conda_build.bat

[codecov]

Codecov Report

Merging #547 (9f4836c) into master (6a6e39f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #547   +/-   ##
=======================================
  Coverage   94.18%   94.18%           
=======================================
  Files          29       29           
  Lines        6208     6208           
  Branches      663      663           
=======================================
  Hits         5847     5847           
  Misses        224      224           
  Partials      137      137           

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[jmwright]

@marcus7070 Thanks!

@adam-urbanczyk I think this is good to merge, do you agree?

[adam-urbanczyk]

Yes, thanks @marcus7070 - merging.