Fixed #279 - added a fallback where we poll the main browser window text from c++ to get the title in case we did not get it directly from the browser.  The downside is that we poll on a 100ms timer so the accuracy isn't quite as good as an active callback but it's much lighter weight than polling in the browser.
Updated the navigation counter to include "andwait" steps.
Merge branch 'master' of github.com:WPO-Foundation/webpagetest