add uw-classic-right-sidebar
Re #12: Create .main and .sidebar areas
Re #12: rename classic-uw-startet.less as classic-uw.less, so it can be used to store all LESS code needed for classic uw templates
Re #12: Import custom LESS for classic-uw template
Re #12: set .sidebar height to 100%
Re #12: set .sidebar background color to @uw-cream
Re #12: add borders to .container . row and .sidebar-right
Re #12: Add .box-shadow to .uw-navbar-classic .container
Re #12: Style .nav-sidebar links
Re #12: Update description text
Re #12: add thumbnail image for uw classic right sidebar
Re #12: uw classic right sidebar to list of examples
Merge branch 'task_12' into develop