Make the footer stick to the bottom of the page
Merge branch 'master' of github.com:CUL-DigitalServices/avocet-ui into sticky-footer

Conflicts:
	avocet/changing.html
	avocet/openaccess.html
	avocet/todo.html
Merge branch 'master' of github.com:CUL-DigitalServices/avocet-ui into sticky-footer

Conflicts:
	avocet/changing.html
	avocet/index.html
	avocet/openaccess.html
	avocet/todo.html
Merge branch 'sticky-footer' of https://github.com/timdegroote/3akai-ux into sticky-footer