Fix portraits tile size.

 On branch master

	modified:   public/images/portraits.jpg
	modified:   public/images/portraits_hover.jpg
New tile positioning.

 On branch master

	modified:   public/images/contact.jpg
	modified:   public/images/contact_hover.jpg
	new file:   public/images/russian.jpg
	new file:   public/images/russian_hover.jpg
	modified:   public/index.html
	modified:   public/scripts/main.js