Support for OLD Rest Api and FQL

[prabirshrestha]

Old rest api support was not initially planned.

But since facebook graph api doesn't support most of the features, i think its crucial to have it.

All methods using RestApi will be marked as [Obsolete] to discourage using it. Use the rest api only if you can't do it by Graph Api.

[prabirshrestha]

to differentiate graph api and old rest api, the methods will be similar to graph api methods, execpt with different method name as below.

[Obsolete("Use the graph api Get() if possible.")]
public string GetUsingRestApi(string methodName, IDictionary<string, string> parameters);

methods names will have "UsingRestApi" appended to it.

[prabirshrestha]

partial old rest api implemented for synchronous methods.

[Obsolete("Use the graph api Get() if possible.")]
public string GetUsingRestApi(string methodName, IDictionary<string, string> parameters){}

var result = fb.GetUsingRestApi("friends.get");

sync FQL also implemented

var result = fb.Query("SELECT uid from users");