Update hprose for Delphi

Optimized serialize of hprose for Delphi.
Added anonymous callback & errorevent support for HproseClient of
Delphi.
Fixed IntfToObj for Delphi 2005-2009
Update hprose for Delphi

Added TStrings serialize support for Delphi.
IntfToObj return TInterfacedObject instead TObject.
Added const keyword for some method in THproseWriter.