adcentric: Create js tag using DOM manipulation

Rather than writing a string of html, use the DOM api to built the
`script` element.
jivox: Sanitize subdomain to only alphanumeric values
pictela: Tweak regex to only match first domain from the hash

Also fixes how script is printed to the page (uses DOM api instead of
writing block of html)
comscore: Fix domain validation regex

Escapes the periods to treat them literally and adds a trailing slash
check on the domain
viewpoint: Remove obsolete viewpoint iframe buster

This service is no longer in operation
klipmart: Remove obsolete klipmart iframe buster

The js file referenced here is obsolete and gone from the interwebs