Minor tweaks to frame extraction

Based on what I've learned so far playing with segment.
Merge branch 'master' of github:databrary/databrary
gut static content; frontpage = search
Merge branch 'master' of https://github.com/databrary/databrary
(amend last commit)
Remove SiteController.isSecure now that it always has to be
Remove api-spec.txt, superseded by conf/routes
Remove and/or cleanup more Async.waits in html
Put libraries after source in av.c build
Avatars, Core volume, minor Party cleanup

I didn't create a model for Avatars.  There didn't seem much point.  All
avatars are considered public, but I suppose this could be tweaked with
classifications?  Old avatars are orphaned, aside from audit records.  I
tried creating asset_revisions for them, but it didn't feel right.
Don't show core volume in all list
Update public/private (removed profile images)
Update README about secure mode.
Add party.duns for institutions

As per Lisa's request
Remove special Container.json so it looks like a slot

Add special Container.containerJson where necessary.
comment and materials fixes
Merge remote-tracking branch 'remotes/origin/master' into angular

Conflicts:
	app/controllers/static.scala
	app/views/angular/controllers/toolbarCtrl.scala.html
	app/views/display.scala
	app/views/widget/footerStatic.scala.html
	app/views/widget/template/static.scala.html
	conf/routes