Better README formatting.

README.md

@@ -62,17 +62,21 @@ print(sub)
 ```swift
 let a = Rational(1,2);
 let b = Rational(3,6);
+
 print(a==b)
 // true
+
 print(a<b)
 // false
 ```
 ### Getting the numerator and denominator of a Rational numbers
 
 ```swift
 let a = Rational(12,18);
+
 print(a.numerator)
 // 2
+
 print(a.denominator)
 // 3
 ```
@@ -82,6 +86,7 @@ print(a.denominator)
 let a = Rational( 0.251, maxDenominator: 16 );
 print(a)
 // 1/4
+
 let b = Rational( 0.251, maxDenominator: 256 )
 print(a)
 // 63/251
@@ -91,17 +96,20 @@ print(a)
 
 ```swift
 let a = Rational( 3,2 );
+
 let d = Double(a);
 print(d)
 // 1.5
+
 let i = Int(a);
 print(i)
 // 1
+
 let s = String(a);
 print(s)
 // "3/2"
 ```
 
 ## License
 
-This project is licensed under the MIT License
+This project is licensed under the MIT-style license, see source files