Move Pages docs to new location

doc/README.md

doc/administration/high_availability/load_balancer.md

doc/administration/pages/index.md

doc/install/installation.md

doc/pages/README.md

doc/pages/administration.md

doc/university/README.md

doc/university/support/README.md

doc/user/project/pages/img/pages_create_project.png

doc/user/project/pages/img/pages_create_user_page.png

doc/user/project/pages/img/pages_dns_details.png

doc/user/project/pages/img/pages_multiple_domains.png

doc/user/project/pages/img/pages_new_domain_button.png

doc/user/project/pages/img/pages_remove.png

doc/user/project/pages/img/pages_upload_cert.png

doc/user/project/pages/index.md