Release 0.6.3

[chfw]

With your PR, here is a check list:

• [x] Has test cases written?
• [x] Has all code lines tested?
• [x] Has make format been run?
• [x] Please update CHANGELOG.yml(not CHANGELOG.rst)
• [x] Passes all Travis CI builds
• [ ] Has fair amount of documentation if your change is complex
• [ ] Agree on NEW BSD License for your contribution

[codecov-io]

Codecov Report

Merging #98 into master will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #98   +/-   ##
=======================================
  Coverage   97.83%   97.83%           
=======================================
  Files          52       52           
  Lines        3328     3332    +4     
=======================================
+ Hits         3256     3260    +4     
  Misses         72       72           

Impacted Files	Coverage Δ
pyexcel_io/exceptions.py	100.00% <ø> (ø)
pyexcel_io/readers/__init__.py	100.00% <ø> (ø)
pyexcel_io/reader.py	97.10% <100.00%> (-0.24%)	:arrow_down:
pyexcel_io/readers/csvz.py	100.00% <100.00%> (ø)
tests/test_issues.py	100.00% <100.00%> (ø)
tests/test_service.py	100.00% <100.00%> (ø)
pyexcel_io/book.py	68.51% <0.00%> (-0.93%)	:arrow_down:
pyexcel_io/plugins.py	95.49% <0.00%> (-0.91%)	:arrow_down:
pyexcel_io/service.py	97.39% <0.00%> (+1.73%)	:arrow_up:

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