Try to avoid page crawl errors by setting page_url when is_single()

http://adcodemanager.wordpress.com/2013/04/10/hi-all-on-a-dotcom-site-th
at-uses/
Revert "Try to avoid page crawl errors by setting page_url when is_single()". Changing approach.

This reverts commit 5026edca02bf8e9e824f05da844150e989f5a648.
Don't show ads on preview
Merge branch 'master' of git://github.com/paulgibbs/Ad-Code-Manager into paulgibbs-master
Adding a configuration filter acm_disable_ad_rendering