Port for macOS (#311)

* merged moonlight-mac with moonlight-ios

* reverted to the original project.pbxproj

* cleaned up the code, fixed lots of unnecessary code duplications

* multicontroller support (not tested)

* new class that can be used for further modularization of the MainFrameViewController

Limelight/Network/AppAssetRetriever.m

@@ -18,16 +18,27 @@ static const double RETRY_DELAY = 2; // seconds
 static const int MAX_ATTEMPTS = 5;
 
 - (void) main {
+
+#if TARGET_OS_IPHONE
     UIImage* appImage = nil;
+#else
+    NSImage* appImage = nil;
+#endif
+    
     int attempts = 0;
     while (![self isCancelled] && appImage == nil && attempts++ < MAX_ATTEMPTS) {
         
         HttpManager* hMan = [[HttpManager alloc] initWithHost:_host.activeAddress uniqueId:[IdManager getUniqueId] deviceName:deviceName cert:[CryptoManager readCertFromFile]];
         AppAssetResponse* appAssetResp = [[AppAssetResponse alloc] init];
         [hMan executeRequestSynchronously:[HttpRequest requestForResponse:appAssetResp withUrlRequest:[hMan newAppAssetRequestWithAppId:self.app.id]]];
-        
+
+#if TARGET_OS_IPHONE
         appImage = [UIImage imageWithData:appAssetResp.data];
         self.app.image = UIImagePNGRepresentation(appImage);
+#else
+        
+#endif
+
         
         if (![self isCancelled] && appImage == nil) {
             [NSThread sleepForTimeInterval:RETRY_DELAY];