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/SystemState/SystemLanguage.cs

@@ -0,0 +1,23 @@
+namespace Ryujinx.HLE.HOS.SystemState
+{
+    public enum SystemLanguage
+    {
+        Japanese,
+        AmericanEnglish,
+        French,
+        German,
+        Italian,
+        Spanish,
+        Chinese,
+        Korean,
+        Dutch,
+        Portuguese,
+        Russian,
+        Taiwanese,
+        BritishEnglish,
+        CanadianFrench,
+        LatinAmericanSpanish,
+        SimplifiedChinese,
+        TraditionalChinese
+    }
+}