Changes to build JSON serializer with Silverlight about servicestack HOT 4 CLOSED

Hi Eric,

Thanks for the updates! 

I've decided to refactor the current code-base to incorporate your changes 
rather than maintaining multiple #if/defs everywhere since it makes the code 
cleaner, no need for special build flags and the same code paths get tested etc.

Yeah I consider both snippets to be effectively equivalent - my guess is the 
first one would've thrown an exception if the parsed failed. 

I ended up copying mono's ConvertFromUtf32 implementation so unicode escaping 
should now hopefully work in Silveright.

I believe I've incorporated and checked in all of your changes let me know if 
I've missed any.

Cheers,
Demis

Thank you for updating your code. However there's a static class, 
FormatterServices in System.Runtime.Serialization, that is not accessible in 
Silverlight and that you use at line 283 in file ReflectionExtensions.cs.

Yeah that's a problem as I need that to support anonymous types. So I've had to 
put a #if/def around it.