Debugging editor CRM loading

Fixed broken C# implementation of "String::Read" (from native) which was
causing overreading from the file. Fixed C# Encoding.ASCII.GetString not
truncating at null-terminator via helper method. Fixed C# implementation
of LoadLZW indexing a List(T) instead of calling the Add method and
getting the wrong image dimensions. Further debugging is required to
complete reading CRM files.