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Merge pull request #1 from jo9026/master

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Added unittest for ShippingLogic
Merge branch 'master' of github.com:jo9026/WillametteShippingCalculator-Group5
Added one shipping logic unit test
Finished testing a function
Merge pull request #3 from jo9026/master

Added unittest for calculating shipping cost.
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Merge pull request #4 from jo9026/master

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Update .travis.yml
Update .travis.yml
Merge pull request #2 from futottapan/master

Added one shipping logic unit test
add unittest to saleitem