Document with sample building a manage package for all worlds

[yishaigalatzer]

See JamesNK/Newtonsoft.Json#618 (comment)

And in particular
There needs to be a sample or guide of how to create a nuspec that mixes old targets like net45/win8/portable-* with dotnet that works with new project.json apps like DNX and UAP while still playing nice with the old packages.json

Consider this - JamesNK/Newtonsoft.Json#618 (comment) will anyone reading the documentation understand that blank groups are required for some targets?

[csharpfritz]

Introduction blog post and new tutorial section with 5 minute videos in similar structure as https://docs.npmjs.com/getting-started/what-is-npm coming soon

[kraigb]

csharpfritz -- did the blog and tutorial happen as you suggested? I'm not clear where it might exist in the docs, if it does. If there is material that needs to be pulled into the docs, let me know where it is.

[nkolev92]

Closing this as redundant.