Work on making the search stuff cleaner and more flexible. Added some
charts on the index page which use various different faceted search data
via actions in a new admin Metrics controller. All this stuff is liable to
change greatly in the coming weeks.
Minor tweaks to the default routes
Prevent form submit (fixing stupid FF-only bug.)
Add an ajax spinner, and use it while loading graphs
Remove spinner on plot render
Fix css
Ensure a placeholder user is instead of nothing when indexing accessors
Cleanups to the (still-WIP) iteratee-based indexing system
Add isTopLevel field
Use isTopLevel instead of depthOfDescription (which is harder to set).
Merge branch 'master' into portal_integration

Conflicts:
	modules/core/app/controllers/Application.scala
	modules/core/app/utils/search/ItemPage.scala
	modules/portal/app/views/portal.scala.html
	modules/portal/conf/portal.routes
Merge various JS enhancements from master into portal_integration