Support for crossgen in msbuild fsproj

[enricosada]

GOAL

The .NET Core Sdk can be used as replacement of old fsproj for normal development.

Support crossgen (multiple target frameworks in same project), the new fsproj can produce console/nugetpackage for multiple frameworks (.net fw, pcl, netcore).
The sdk cli experience is fully supported.
VS Code require mono installed in osx/unix and .net full on windows (because net461 project can use type provider, and current netcoreapp1.0 fsc compiler cannot do that).
Make it easy to migrate from old fsproj -> msbuild 15 fsproj for .net core sdk
The merge of packages (.net fw and netcore) is not needed anymore
The dotnet test test runner works in IDEs

TODO

• Test suite of all sdk commands:
  • crossgen (net451 + netstandard/netcoreapp + pcl)
• Add option to switch target framework ionide/ionide-vscode-fsharp#278 VS Code support for multi targeting (can switch current target)
• Paket is supported
• IDE supported: VS
• IDE supported: Xamarin studio

[stephan-tolksdorf]

@enricosada Is it possible to target PCL 259, i.e. portable-net45+win8+wpa81+wp8, using the new SDK? Could you maybe point me to an example fsproj file?

[enricosada]

@stephan-tolksdorf new sdk doesnt support creation of portable profiles. MS deprecated these in favor of netstandard.

[enricosada]

closing as supported from cli.
VS and VSCode are tracked in respective repo