Update README.md

Author: nst

README.md

@@ -24,7 +24,7 @@ You can use the headers this way:
  BOOL success = [b load];
 
  Class FTDeviceSupport = NSClassFromString(@"FTDeviceSupport");
- id si = [FTDeviceSupport sharedInstance];
+ id si = [FTDeviceSupport valueForKey:@"sharedInstance"];
 
  NSLog(@"-- %@", [si valueForKey:@"deviceColor"]);
 
@@ -38,4 +38,4 @@ The code to draw this picture is in [https://github.com/nst/RuntimeBrowser/tree/
 
 ![iOS Frameworks](ios_frameworks.png)
 
-Nicolas Seriot
+Nicolas Seriot