WIP - New style io

[chfw]

adapt pyexcel-io 0.6.0 : pyexcel/pyexcel-io#80

[codecov-commenter]

Codecov Report

Merging #43 into dev will decrease coverage by 0.01%.
The diff coverage is 96.55%.

@@            Coverage Diff             @@
##              dev      #43      +/-   ##
==========================================
- Coverage   96.67%   96.66%   -0.02%     
==========================================
  Files          12       12              
  Lines         631      629       -2     
==========================================
- Hits          610      608       -2     
  Misses         21       21              

Impacted Files	Coverage Δ
pyexcel_xlsx/xlsxw.py	95.83% <94.11%> (-4.17%)	⬇️
pyexcel_xlsx/xlsxr.py	89.25% <97.14%> (+0.63%)	⬆️
pyexcel_xlsx/__init__.py	100.00% <100.00%> (ø)
tests/test_filter.py	100.00% <100.00%> (ø)
tests/test_multiple_sheets.py	97.25% <100.00%> (ø)
tests/test_writer.py	97.14% <100.00%> (-0.16%)	⬇️

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