Forward declarations of interfaces are now recoginzed
Forward declarations of interfaces are now recoginzed

Forward declarations of classes work well while forward declarations of interfaces didn't do. With this change forwarding works wih interfaces too.
monkeyxu/DelphiAST,AmesianX/DelphiAST,RomanYankovsky/DelphiAST,Wosi/DelphiASTTemp,LaKraven/DelphiAST,NickRing/DelphiAST,uschuster/DelphiAST,Wosi/DelphiAST,vintagedave/DelphiAST