Merge pull request #154 from iuloshi/gh-pages

Updates to mostly UI toolkit pages
Different Overview feature image
Remove new image
Add content to Grid page
Remove tabs
Add CSS to LESS for Grids page
Add .cols-12
Re-title Grid example
Merge pull request #157 from ohsk/gh-pages

Update UI Toolkit > Grids and Layout page
Update guides.md

updated overview text to match the other two sections a lil better
Merge pull request #158 from benguhin/patch-1

Update guides.md
Update identity.md

removed the third sentence
Merge pull request #159 from benguhin/patch-2

Update identity.md
Update ui-toolkit.md

added designer credit :) and tried to make the last part more active
Update buttons.md

Removed sentence about destructive actions in the header - it's better explained in the dedicated section later in the page
Update expandables.md

Updated intro to make it more consistent with buttons and links
Update links.md

Removed "should"
Update Primary and Secondary buttons content
Update pagination.md

- simplified the mentions of infinite scroll
- updated the usage to be more about how to use the component
Make color page responsive; remove date from banner