Update to VS2013
Add FSharp.Formatting and convert some docs

Use an experimental version of FSharp.Formatting that supports
evaluation - PR sent. Converted QuickStart and Properties chapters to
literate script file.
Merge branch 'fsharp.formatting'

Rather take the important context of fsharp.formatting and move it under Docs. Clean up and integration in build to follow later.
Add SourceLink.Fake to bootstrap
Delay package dependencies in build.fsx.