Add table alignment example

Author: Raphael-Vogel

README.md

@@ -83,6 +83,20 @@ Content Cell  | Content Cell
 Content Cell  |  \| 
 ```
 
+Left, right and center aligned table
+
+Left aligned Header | Right aligned Header | Center aligned Header
+| :--- | ---: | :---:
+Content Cell  | Content Cell | Content Cell
+Content Cell  | Content Cell | Content Cell
+
+```
+Left aligned Header | Right aligned Header | Center aligned Header
+| :--- | ---: | :---:
+Content Cell  | Content Cell | Content Cell
+Content Cell  | Content Cell | Content Cell
+```
+
 `code()`
 
     Markup :  `code()`