Add initial component structure
Add initial html and css code
Add Showcase class with ajax requests and basic rendering
Add Showcase ability to render with template
Add thumbnails, url history, chager server API
Add ability for thumbnails to render in groups

Also do some refactoring.
Fix bug in Firefox with links remaining focused

Also do some refactoring
Change thumbnails rendering

Now thumbnails section renders by adding new thumbnails and not by
complete rebuild.
Change the looks of thumbnails section
Merge branch 'testing'
Add description how the whole works in Russian