Add syntax highlighting for examples

And also removed the redundant "language". I think for the ones reading this, it is obvious that these are (programming) languages… 😊

Readme.markdown

@@ -40,8 +40,9 @@ More information about QR Code technology and this library's design can be found
 Examples
 --------
 
-Java language:
+Java:
 
+```java
 import java.awt.image.BufferedImage;
 import java.io.File;
 import javax.imageio.ImageIO;
@@ -60,9 +61,11 @@ Java language:
         (... paint qr1.getModule(x, y) ...)
     }
 }
+```
 
-JavaScript language:
+JavaScript:
 
+```js
 // Name abbreviated for the sake of these examples here
 var QRC = qrcodegen.QrCode;
 
@@ -78,9 +81,11 @@ JavaScript language:
         (... paint qr1.getModule(x, y) ...)
     }
 }
+```
 
-Python language:
+Python:
 
+```python
 from qrcodegen import *
 
 # Simple operation
@@ -93,9 +98,11 @@ Python language:
 for y in range(qr1.get_size()):
     for x in range(qr1.get_size()):
         (... paint qr1.get_module(x, y) ...)
+```
 
 C++ language:
 
+```c++
 #include <string>
 #include <vector>
 #include "QrCode.hpp"
@@ -115,9 +122,11 @@ C++ language:
         (... paint qr1.getModule(x, y) ...)
     }
 }
+```
 
 C language:
 
+```c
 #include <stdbool.h>
 #include <stdint.h>
 #include "qrcodegen.h"
@@ -145,9 +154,11 @@ C language:
 uint8_t qr1[qrcodegen_BUFFER_LEN_FOR_VERSION(7)];
 ok = qrcodegen_encodeBinary(dataAndTemp, 3, qr1,
     qrcodegen_Ecc_HIGH, 2, 7, qrcodegen_Mask_4, false);
+```
 
-Rust language:
+Rust:
 
+```rust
 extern crate qrcodegen;
 use qrcodegen::QrCode;
 use qrcodegen::QrCodeEcc;
@@ -168,7 +179,7 @@ Rust language:
         (... paint qr1.get_module(x, y) ...)
     }
 }
-
+```
 
 License
 -------