add support for stash and other registry URLs

[bcoe]

Currently we use the module:

https://www.npmjs.com/package/github-url-to-object

For parsing the repo information that we display on the package pages.

If a URL is not github.com, it would be good if we fell back to simply using the URL that had been provided in the package.json.

[akselnordal]

This sounds like a good solution. Thanks! It would be nice though to support bitbucket as well (as linked in the github-url-to-object above) - https://github.com/zeke/bitbucket-url-to-object

[kevinSuttle]

And GHE!