Updated markdown

Author: vasanthk

styling/03.style-functions.md

@@ -1,10 +1,7 @@
 # Style Functions
 Since we’re using JavaScript, we can also employ helper functions for styling elements.
 
-### Reference:
-- http://jxnblk.com/writing/posts/patterns-for-style-composition-in-react/
-
-1. EXAMPLE 1
+#### Example 1
 
 A function to create rgba values of black
 ```javascript
@@ -26,7 +23,7 @@ const shade = [
 // shade[4] is 'rgba(0, 0, 0, 0.5)'
 ```
 
-2. EXAMPLE 2
+#### Example 2
 
 Creating a scale for margin and padding to help keep visual rhythm consistent
 ```javascript

styling/04.using-npm-modules.md

@@ -1,11 +1,7 @@
 # Using npm modules
 For more complex color/style transformation logic, it's always god to use it from a separate npm module (or) create one.
 
-### Reference:
-- http://jxnblk.com/writing/posts/patterns-for-style-composition-in-react/
-
-
-Example:
+#### Example
 
 For darkening scales in CSS you can use `chroma-js` module
 ```javascript

styling/05.base-component.md

@@ -3,9 +3,6 @@
 There is tremendous amount of flexibility when it comes to composition in React – since components are essentially just functions.
 By changing style details in a component to props we can make it more reusable.
 
-### Reference:
-- http://jxnblk.com/writing/posts/patterns-for-style-composition-in-react/
-
 The color and backgroundColor properties have been moved up to the component’s props.
 Additionally, we’ve added a big prop to adjust the padding top and bottom.
 ```javascript
@@ -38,7 +35,7 @@ const Button = ({
   )
 };
 ```
-Usage Example
+#### Usage
 ```javascript
 const Button = () => (
   <div>