Fixed broken link to block storage service specification

Change-Id: Idaa8a93b725ccd93712f2dc8eb3f18cabb22da0a
author: diane fleming
Made hover text consistent for top menu

Change-Id: Id415b7d930198512afb66eb985673b0c1110d2f2
author: Diane Fleming
Update title of Programming with Python and Shell for consistency

bug: #1178388

Change-Id: I5fdac0bf0cb3dd0fde1a99cd93349492812341d4
author: diane fleming