Fixes for GH-195 / GH-27
Adds test for multihost
Addes test folder
Update 404.jade

Changed the 404 message to not match the content of index.jade.
Merge pull request #212 from shovon/master

Changed 404 so it doesn't match index
Merge pull request #207 from silentrob/master

Make Multi host work more generically
Failed compile exits with error

This will allow authors to use tool chains like `npm test` with `harp compile` and if used with Travis, could automatically deploy on successful compilation.
Merge pull request #218 from remy/master

Failed compile exits with error
adds Remy Sharp to contributors list
resolves package.json conflict
resolves package.json error