release 0.6.1

[chfw]

With your PR, here is a check list:

• Has test cases written?
• Has all code lines tested?
• Has make format been run?
• Please update CHANGELOG.yml(not CHANGELOG.rst)
• 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 #11 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #11   +/-   ##
=======================================
  Coverage   98.14%   98.14%           
=======================================
  Files           8        8           
  Lines         378      378           
=======================================
  Hits          371      371           
  Misses          7        7           

Impacted Files	Coverage Δ
pyexcel_xlsxw/__init__.py	100.00% <ø> (ø)
tests/base.py	98.18% <ø> (ø)
tests/test_stringio.py	100.00% <ø> (ø)
pyexcel_xlsxw/xlsxw.py	100.00% <100.00%> (ø)
tests/test_bug_fixes.py	100.00% <100.00%> (ø)
tests/test_formatters.py	100.00% <100.00%> (ø)
tests/test_multiple_sheets.py	97.12% <100.00%> (ø)
tests/test_writer.py	96.96% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 952ab05...a85759b. Read the comment docs.