CI: Travis & Codecov Integration

[eytan-avisror]

Adds a basic travis-ci integration
Adds a basic codecov integration

[CLAassistant]

All committers have signed the CLA.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@2c36125). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master       #3   +/-   ##
=========================================
  Coverage          ?   69.37%           
=========================================
  Files             ?        5           
  Lines             ?      542           
  Branches          ?        0           
=========================================
  Hits              ?      376           
  Misses            ?      122           
  Partials          ?       44

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