Create appveyor.yml
Fix test cases when execSync doesn't install properly
Don't throw errors if we are unable to clean up properly
Silence warnings in test cases

Hopefully this will make AppVeyor happy
fix some bugs
Silence the warnings again
More avoiding warnings
Add osx testing to travis
Add Appveyor badge
Merge pull request #6 from ForbesLindesay/appveyor

Appveyor