Syntax-coloring Objective-C code

Just a tiny contribution to an otherwise AMAZING write-up. Really good realistic introduction to FP (or FRP) for Obj-C developers. The community should be thankful for this. I know I am :)
Fixing NSDictionary indentation
Fixed more NSDictionary indentation
Merge pull request #1 from JaviSoto/patch-1

Syntax-coloring Objective-C code