Add metadata dictionary in OutputFileInfo (#1260)
Add metadata dictionary in OutputFileInfo (#1260)


pascalberger/docfx,LordZoltan/docfx,pascalberger/docfx,dotnet/docfx,928PJY/docfx,928PJY/docfx,superyyrrzz/docfx,dotnet/docfx,superyyrrzz/docfx,LordZoltan/docfx,LordZoltan/docfx,pascalberger/docfx,hellosnow/docfx,hellosnow/docfx,DuncanmaMSFT/docfx,DuncanmaMSFT/docfx,hellosnow/docfx,LordZoltan/docfx,dotnet/docfx,928PJY/docfx,superyyrrzz/docfx