remove @backbone reference in people/show (thx @mrZYX for the catch); added loaders to people and tag pages

controllers; update the default referee to /stream [ci skip]

Merge branch 'input-placeholders' of https://github.com/Raven24/diaspora into Raven24-input-placeholders

DG MS; only fetch contacts when focused in on Publisher.input(); limit autocomplete; added uma back; fixed jasmine tests.

You can now use rake assets:precompile to upload all of your static assets to s3.  This uses your prexisiting settings in AppConfig for s3. then, start your server with ASSET_HOST={cdn_hostname} remember to include https and no trailing slash

collapse Post#last_three_comments and Commentable#last_three_comments, do not double query comments in CommentsController#index for a JSON response, remove spec that tests ordering as it's not deterministic on psql without specified order

don't use .last(3), use .limit(3) instead.  also, don't put an order on an association as it isn't overridable.  (this commit minimizes AR object instantiation in the stream)

remove a bunch of unused images.  we might use one or two of these on test but we can deal with it later [ci skip]

chance to test it first Revert "finally found a way to disable airbrake [ci skip]"

This reverts commit 8aafd564.