Update README.md

README.md

 
 This implementation conforms to [N3949][1], except:
 
-1. **Namespace:** Another namespace is used instead of `std`.
-1. **Filenames:** The filenames contain a `.h` extension.
+##### Namespace 
+Another namespace is used instead of `std`.
+
+##### Filenames
+The filenames contain a `.h` extension.
 
 These deviations are necessary through standard requirements.