search - fixes for #422 various paging bugs
registration - add missing accounts template

this is required when email verification is forced. earlier
testing did not consider this settings
bug fix - add back decorator lost in merge
activity feeds - fix comment activity template bug

ignore any comment activity if the commented on object
no longer exists. add tests, notes. minor cleanup.
registration - use account setting for link

use the setting from the accounts app instead of the older
settings. adjust context processor to add this
Merge branch 'master' into production