default homepage is wrong

[jonschlinkert]

I think the reason is that the same homepage is probably used for both package.json and the github repository. but I think these should be different. The package.json homepage is used by NPM to link back to the project, but when you're already on the project, you don't need that link.

[jonschlinkert]

@doowb I think we should just use the org's github url for homepage if it's an org, otherwise the user's