release 0.5.8

[chfw]

With your PR, here is a check list:

• [ ] Has Test cases written
• [x] Has all code lines tested
• [ ] Passes all Travis CI builds
• [ ] Has fair amount of documentation if your change is complex
• [ ] run 'make format' so as to confirm the pyexcel organisation's coding style
• [x] Please update CHANGELOG.rst
• [ ] Please add yourself to CONTRIBUTORS.rst
• [ ] Agree on NEW BSD License for your contribution

fixes #34

[codecov-io]

Codecov Report

Merging #35 into master will decrease coverage by 1.1%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #35      +/-   ##
==========================================
- Coverage   97.77%   96.67%   -1.11%     
==========================================
  Files          12       12              
  Lines         629      631       +2     
==========================================
- Hits          615      610       -5     
- Misses         14       21       +7

Impacted Files	Coverage Δ
pyexcel_xlsx/xlsxw.py	100% <ø> (ø)	:arrow_up:
pyexcel_xlsx/xlsxr.py	88.61% <ø> (-5.7%)	:arrow_down:
pyexcel_xlsx/__init__.py	100% <100%> (ø)	:arrow_up:

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[chfw]

for myself, this project now has new maintainer friendly features:

1. auto release -> gease version description -> auto publish is done by github
2. moban related project info has now inherit from pyexcel-mobans, which means: changes there will semi-auto-propagate. fully automated meta info propagation is under development.