Update JsonDeserializer.cs

Fix for bug parsing an array of doubles. (Issue #373)
Change Deserializers to support value types

Fixes #564
Converted tabs to spaces and corrected an error;
Merge branch 'master' of https://github.com/restsharp/RestSharp

Conflicts:
	RestSharp/IRestRequest.cs
	RestSharp/RestRequest.cs
Merge branch 'master' of git://github.com/darvids0n/RestSharp into darvids0n-master

Conflicts:
	RestSharp/Deserializers/JsonDeserializer.cs
	RestSharp/Deserializers/XmlDeserializer.cs
Added a test for deserializing JSON into a struct
Added a test to deserialize xml into a struct
Merge branch 'darvids0n-master'
Merge branch 'master' of git://github.com/monkey-j/RestSharp into monkey-g-patch-1

Conflicts:
	RestSharp/Deserializers/JsonDeserializer.cs
Merge branch 'monkey-g-patch-1'