Package Detail page templated and Contact Form 7 booking form integrated

Use of Contact Form 7 has thrown styling of page. To be addressed in
future commit.
Added Featured Image code to head of package page
Home Page templated

Subscribe form left static ready for MailChimp integration.
Added custom image size for gallery lighbox.
Gallery templated, inclusive of custom image size in lightbox
Added [if] Custom Weekends functionality to package template

Wordpress post needs to be called "Custom Weekends" for template to
load custom layout and field types.
Static primary nav added to sub pages
Deleted plugin not-needed
Merge branch 'custom-post-types' into wordpress-integration