Add ability to set Host and Date when built for .NET 4.0
Add ability to set Host and Date when built for .NET 4.0

mattleibow/RestSharp,eamonwoortman/RestSharp.Unity,IsCoolEntertainment/unity-restsharp,uQr/RestSharp,Haacked/RestSharp,IsCoolEntertainment/unity-restsharp,rucila/RestSharp,who/RestSharp,fmmendo/RestSharp,devinrader/RestSharpRTExperimental,SaltyDH/RestSharp,mattwalden/RestSharp,dmgandini/RestSharp,jiangzm/RestSharp,chengxiaole/RestSharp,kouweizhong/RestSharp,wparad/RestSharp,mwereda/RestSharp,restsharp/RestSharp,periface/RestSharp,RestSharp-resurrected/RestSharp,lydonchandra/RestSharp,PKRoma/RestSharp,huoxudong125/RestSharp,paulcbetts/RestSharp,benfo/RestSharp,dyh333/RestSharp,KraigM/RestSharp,haithemaraissia/RestSharp,dgreenbean/RestSharp,cnascimento/RestSharp,devinrader/RestSharpRTExperimental,wparad/RestSharp,felipegtx/RestSharp,paulcbetts/RestSharp,amccarter/RestSharp,Haacked/RestSharp,rivy/RestSharp