Add Agenda page
Added Agenda action
Initial agenda layout
Some styling, links to all sessions/speakers
Updated with @alastairs feedback
Corrected links
Added Agenda route
Added print stylesheet that hides navbar/footer/sidebar/masthead
tweak some styles and remove the non-confirmed talks
uncomment Joel's session
add a link to the agenda into the menu
Merge branch 'Phils-Agenda' into staging

Merge in the agenda change