minor typo, fonts update, image adjustments

various updates on font, layout, etc.
fond on index slide 4 adjusted

adjusted to use Open Sans font
fixed top-header display in mobile devices

removed jquery to pull header dynamically and used static top-header
instead
adjusted about pages for mobile view

adjusted layout to adapt to mobile layout. tested in samsung galaxy tab
3.
adjusted service pages for mobile view

adjusted layout for mobile view
update caption on slides to show on mobile

updated font rendering and z-index to properly show on mobile device