Add Repository field to package.json

Seeing "npm WARN package.json http-proxy@1.0.2 No repository field." makes me anxious and its such an easy action to add a repo field to the package.json.
@xtreme-topher-bullock - update package.json to have proper repository key and formatting
Merge pull request #578 from xtreme-topher-bullock/patch-1

Add Repository field to package.json