Misc cleanup (#708)

* Fix typos

* Remove unneeded using statements

* Enforce var style more

* Remove redundant qualifiers

* Fix some indentation

* Disable naming warnings on files with external enum names

* Fix build

* Mass find & replace for comments with no spacing

* Standardize todo capitalization and for/if spacing

Ryujinx.HLE/HOS/Services/Aud/IAudioDevice.cs

@@ -36,7 +36,7 @@ namespace Ryujinx.HLE.HOS.Services.Aud
 
             _systemEvent = new KEvent(system);
 
-            //TODO: We shouldn't be signaling this here.
+            // TODO: We shouldn't be signaling this here.
             _systemEvent.ReadableEvent.Signal();
         }