Code style fixes and nits on the HLE project (#355)

* Some style fixes and nits on ITimeZoneService

* Remove some unneeded usings

* Remove the Ryujinx.HLE.OsHle.Handles namespace

* Remove hbmenu automatic load on process exit

* Rename Ns to Device, rename Os to System, rename SystemState to State

* Move Exceptions and Utilities out of OsHle

* Rename OsHle to HOS

* Rename OsHle folder to HOS

* IManagerDisplayService and ISystemDisplayService style fixes

* BsdError shouldn't be public

* Add a empty new line before using static

* Remove unused file

* Some style fixes on NPDM

* Exit gracefully when the application is closed

* Code style fixes on IGeneralService

* Add 0x prefix on values printed as hex

* Small improvements on finalization code

* Move ProcessId and ThreadId out of AThreadState

* Rename VFs to FileSystem

* FsAccessHeader shouldn't be public. Also fix file names casing

* More case changes on NPDM

* Remove unused files

* Move using to the correct place on NPDM

* Use properties on KernelAccessControlMmio

* Address PR feedback

Ryujinx.HLE/HOS/Services/FspSrv/IFile.cs

@@ -0,0 +1,110 @@
+using Ryujinx.HLE.HOS.Ipc;
+using System;
+using System.Collections.Generic;
+using System.IO;
+
+namespace Ryujinx.HLE.HOS.Services.FspSrv
+{
+    class IFile : IpcService, IDisposable
+    {
+        private Dictionary<int, ServiceProcessRequest> m_Commands;
+
+        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
+
+        private Stream BaseStream;
+
+        public event EventHandler<EventArgs> Disposed;
+
+        public string HostPath { get; private set; }
+
+        public IFile(Stream BaseStream, string HostPath)
+        {
+            m_Commands = new Dictionary<int, ServiceProcessRequest>()
+            {
+                { 0, Read    },
+                { 1, Write   },
+                { 2, Flush   },
+                { 3, SetSize },
+                { 4, GetSize }
+            };
+
+            this.BaseStream = BaseStream;
+            this.HostPath   = HostPath;
+        }
+
+        public long Read(ServiceCtx Context)
+        {
+            long Position = Context.Request.ReceiveBuff[0].Position;
+
+            long Zero   = Context.RequestData.ReadInt64();
+            long Offset = Context.RequestData.ReadInt64();
+            long Size   = Context.RequestData.ReadInt64();
+
+            byte[] Data = new byte[Size];
+
+            BaseStream.Seek(Offset, SeekOrigin.Begin);
+
+            int ReadSize = BaseStream.Read(Data, 0, (int)Size);
+
+            Context.Memory.WriteBytes(Position, Data);
+
+            Context.ResponseData.Write((long)ReadSize);
+
+            return 0;
+        }
+
+        public long Write(ServiceCtx Context)
+        {
+            long Position = Context.Request.SendBuff[0].Position;
+
+            long Zero   = Context.RequestData.ReadInt64();
+            long Offset = Context.RequestData.ReadInt64();
+            long Size   = Context.RequestData.ReadInt64();
+
+            byte[] Data = Context.Memory.ReadBytes(Position, Size);
+
+            BaseStream.Seek(Offset, SeekOrigin.Begin);
+            BaseStream.Write(Data, 0, (int)Size);
+
+            return 0;
+        }
+
+        public long Flush(ServiceCtx Context)
+        {
+            BaseStream.Flush();
+
+            return 0;
+        }
+
+        public long SetSize(ServiceCtx Context)
+        {
+            long Size = Context.RequestData.ReadInt64();
+
+            BaseStream.SetLength(Size);
+
+            return 0;
+        }
+
+        public long GetSize(ServiceCtx Context)
+        {
+            Context.ResponseData.Write(BaseStream.Length);
+
+            return 0;
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing && BaseStream != null)
+            {
+                BaseStream.Dispose();
+
+                Disposed?.Invoke(this, EventArgs.Empty);
+            }
+        }
+    }
+}