Adjust background and set layout fix for smaller viewport heights

Also published another set of HTML files
Merge branch 'calendar' of https://github.com/YorkshireTec/YorkshireTec.com
Added custom mailing list confirmation page
disabled addthis address bar tracking
highlight link when copy is pressed
abstracted left panel into layout
Merge pull request #15 from YorkshireTec/calendar

Calendar
Merge pull request #16 from YorkshireTec/dev

Dev