Update home page grid

Signed-off-by: Phill Coxon <phillcoxon@gmail.com>
Merge branch 'master' of https://github.com/mazhermon/exhibition

Signed-off-by: Phill Coxon <phillcoxon@gmail.com>

Conflicts:
	page-templates/home-page.php
Fix tour list by category

Signed-off-by: Phill Coxon <phillcoxon@gmail.com>