Add missing site metadata and settings

[simonwo]

• webcomicdescription
• webcomicactivitystatus
• webcomicsub
• webcomicid
• comicprofile – link to profile page
• addsubscriptionlink
• webcomicrating – overall rating
• hascomics

Also, usechapters should be on all pages

Also add iscomicrelatedpage for any page that is displaying a comic

Also add currentdate, day, month, year.