5.0.0-alpha003

BUGFIX: Fixed dotnetcore integration:
Paket now properly understands runtime and reference assemblies
Paket now understands the runtime graph and restores runtime dependencies
New API InstallModel.GetRuntimeAssemblies and InstallModel.GetRuntimeLibraries can be used to retrieve the correct assets for a particular RID and TFM
New command paket generate-nuspec
BUGFIX: Improved C++ support
BUGFIX: Proper encoding "+" in package download url - #2288
BUGFIX: Paket failed when group is removed (or renamed) - #2281
BUGFIX: Filter .targets / .props earlier - #2286
BREAKING CHANGE: InstallModel API changed and Paket.Core.dll users might need to adapt