(Bug 5028) Allow a beta feature to be switched on sitewide

Basically take it out of beta with a config change, not a code change.
(Bug 2560) Replace the nouserpic image with a matching padlock on SSL

Icon modified for Dreamwidth by <user name="ninetydegrees">, based on
http://thenounproject.com/noun/lock/#icon-No9489
Merge pull request #363 from afuna/ssl-userpic-bug2560

(Bug 2560) Replace the nouserpic image with a matching padlock on SSL
(Bug 4923) Remove obsolete JS. Remove jQuery beta checks

Not all non-jquery JS files have been removed; some of them are still
being on site-skinned pages elsewhere. Still, this is a start.
Merge pull request #364 from afuna/remove-obsolete-journaljs-bug4923

(Bug 4923) Remove obsolete JS. Remove jQuery beta checks
Merge pull request #362 from afuna/beta-transition-bug5028

(Bug 5028) Allow a beta feature to be switched on sitewide