Add codecov uploading

[xendk]

Might I suggest using https://codecov.io/ ? It's free for open source, makes nice graphs, and gives a new badge.

All you need to do is log in using github, activate the repo and merge this.

[codecov-io]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@c67ec81). Click here to learn what that means. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #22   +/-   ##
=========================================
  Coverage          ?   75.73%           
=========================================
  Files             ?        2           
  Lines             ?      169           
  Branches          ?        0           
=========================================
  Hits              ?      128           
  Misses            ?       41           
  Partials          ?        0

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Continue to review full report at Codecov.

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[xendk]

Heh, CodeCov has opinions because I set it up on my fork for some testing. The Travis failure is odd though.

You can see a (bit boring) example of what CodeCov looks like here: https://codecov.io/gh/xendk/indentinator

[AdamNiederer]

Thanks; I've been meaning to set up coverage! It looks like the travis failure is spurious, again.