Minor naming changes

LaunchParameterizedScript.applescript

@@ -1,4 +1,4 @@
-on launch_app(user_message)
-    tell application user_message to run
-    tell application user_message to activate
+on launch_app(app_name)
+    tell application app_name to run
+    tell application app_name to activate
 end launch_app

LauncherApp/LaunchWithSystemCall.c

@@ -23,5 +23,4 @@ void launchWithSystemCall(const char * const app)
     sprintf(commandLine, "osascript -e \"%s\"", scriptCode);
 
     int result = system(commandLine);
-
 }

LauncherApp/LauncherViewController.m

@@ -146,7 +146,7 @@ - (void)launchWithBundledScriptWithParameters:(NSString *)app
                                                                                                length:sizeof(ProcessSerialNumber)];
 
                 // create an NSAppleEventDescriptor with the script's method name to call,
-                // this is used for the script statement: "on launch_app(user_message)"
+                // this is used for the script statement: "on launch_app(app_name)"
                 // Note that the routine name must be in lower case.
                 NSAppleEventDescriptor *handler = [NSAppleEventDescriptor descriptorWithString: [@"launch_app" lowercaseString]];