Merge pull request dotnet#49 from BillWagner/index-remaining-samples

Add necessary files for samples browser indexing.

Merge pull request dotnet#49 from BillWagner/index-remaining-samples

Add necessary files for samples browser indexing.

Merge pull request dotnet#49 from BillWagner/index-remaining-samples

Add necessary files for samples browser indexing.

Merge pull request dotnet#49 from BillWagner/index-remaining-samples

Add necessary files for samples browser indexing.

split readme into parts (dotnet#48)

The entire readme.md file is loaded and avaialble in the docs.microsoft.com samples browser. Therefore, it should not have the full index with links to all the local code. Instead, move that into an `index.md` file.

Ideally, folks would type `dotnet try --uri index.md`, but if not, there's a link at the end of the readme.md file.

Add samples browser metadata (dotnet#47)

* Add samples browser metadata

This change will add these samples into the docs.microsoft.com samples browser.

Fixes dotnet/samples#1827

* update SDK version for builds