Add to doclets (JSDoc CI)

[lipp]

Adds documentation to doclets.io service. Future tags and master branch will be published automatically.

Preview generated with my account

@fkling If you like this, you are very welcomed to login to https://doclets.io with GitHub OAuth. If you don't like it, I'd be happy to hear what you don't like about it :)

Steps required (3min):

1. @fkling logs in to doclets.io
2. @fkling adds JSNetworkX
3. @fkling merges this PR