added youtube link icon in index cw area

added you tube icon beside cloud workspace under the what we offer
section
header 3 style update on various page

added hr class brd-headling after h3 class headline to all applicable
pages for consistency
slides on index content and style updated

as per request update 201401415
style update on index page slides

further style update on slides related to last commit
image updated with better resolution

cloud workspace images updated.