General: Tidy up includes

Alphabetizes includes and resolves quite a few instances of indirect
inclusions, making the requirements of several interfaces explicit. This
also trims out includes that aren't actually necessary (likely due to
changes in the API over time).

lib/mac/ApplicationCocoa.mm

@@ -1,12 +1,13 @@
 #include <AppKit/AppKit.h>
+
 #include <thread>
 
 #include "boo/IApplication.hpp"
 #include "boo/graphicsdev/Metal.hpp"
-#include "CocoaCommon.hpp"
-#include "../Common.hpp"
+#include "lib/Common.hpp"
+#include "lib/mac/CocoaCommon.hpp"
 
-#include "logvisor/logvisor.hpp"
+#include <logvisor/logvisor.hpp>
 
 #if !__has_feature(objc_arc)
 #error ARC Required

lib/mac/CocoaCommon.hpp

@@ -9,8 +9,9 @@
 
 #include <Metal/Metal.h>
 #include <QuartzCore/CAMetalLayer.h>
-#include <unordered_map>
+
 #include <mutex>
+#include <unordered_map>
 
 namespace boo {
 class IWindow;

lib/mac/WindowCocoa.mm

@@ -1,10 +1,10 @@
 #include "boo/graphicsdev/Metal.hpp"
-#include "CocoaCommon.hpp"
 
 #include "boo/IApplication.hpp"
 #include "boo/IGraphicsContext.hpp"
 #include "boo/IWindow.hpp"
 #include "boo/audiodev/IAudioVoiceEngine.hpp"
+#include "lib/mac/CocoaCommon.hpp"
 
 #include <condition_variable>
 #include <memory>