Button elements implemented

Buttons can be with or without icons. Following points are relevant:

1. All button elements need to have class "btn". 
2. If the button needs an icon, add the class "btn-iconed" to the button element.
3. By default the button is green in colour, if the button needs to be pink, add the class "btn-primary" to the button element.
4. Button elements can be pulled left or right using the state classes "left" and "right" respectively.
5. If the button is an iconed button, it expects an element with the class "icon" in it. Use the font-awesome helper classes for the icon or an image, as long as the icon has the class "icon" specified.

e.g. 

<button class="btn" type="submit">This is a default green button</button>

<a class="btn btn-primary">This is a PINK button</a>

<input class="btn right" type="submit" value="This button is pulled to the RIGHT" />

<a class="btn btn-iconed"><i class="icon icon-star"></i>This button has STAR icon</a>