🥚 🎡 release 0.6.8

[chfw]

Before raising the PR, here is a check list:

• have you written unit tests for your code changes?
• have you updated the change log?
• can someone else understand your changes without your explanation?
• are you proud of your code changes?
• please add your name and github link to contributors.rst in alphabetical order.

[codecov-io]

Codecov Report

Merging #358 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #358      +/-   ##
=========================================
+ Coverage    96.3%   96.3%   +<.01%     
=========================================
  Files          55      55              
  Lines        2812    2814       +2     
=========================================
+ Hits         2708    2710       +2     
  Misses        104     104

Impacted Files	Coverage Δ
moban/_version.py	100% <100%> (ø)	⬆️
moban/core/moban_factory.py	98.1% <100%> (+0.02%)	⬆️

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[chfw]

@jayvdb , please note

python 3.4 support is gone because colorama requires Python '>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*'

it is not down to 'moban' to decide