[WIP] Add support for events (#60)

* Add support for events, move concept of domains to IpcService

* Support waiting for KThread, remove some test code, other tweaks

* Use move handle on NIFM since I can't test that now, it's better to leave it how it was

Ryujinx.Core/OsHle/KernelErr.cs

@@ -6,6 +6,5 @@ namespace Ryujinx.Core.OsHle
         public const int InvalidHandle   = 114;
         public const int Timeout         = 117;
         public const int InvalidInfo     = 120;
-        public const int InvalidIpcReq   = 123;
     }
 }