Added search_controller_spec, moved some tests from people_controller_spec to search_controller_spec

Fixed merged conflict in Changelog

update routes and search controller

remove useless except from search controller

Fix indentation in search_controller

* Rename and reorganize post fetcher to fix autoloading, also let it use
  Faradays default connection so we get nice redirects
* Add initializer to load libs at a central place
* added lib dir to autoload_once paths to increase thread safety
* Moved lib/exceptions.rb to lib/diaspora/ to conform namespacing

  *people_controller#show
  *photos_controller#index
  *views/people/show both html and mobile

* initial backbone port
* changed AspectMembershipsController#destroy to use aspect_membership_id
* included rudimentary jasmine specs
* more specs, updating the list elements after de-/selection
* update selected aspect count on button
* don't even try to render html in AspectMembershipsController
* more specs for button summary text
* adapt aspect management on contacts page and in the popup boxes
* adapt inline creation of aspects + memberships

TODO
* more tests

* added a presenter for hovercard json
* added new backbone view for handling hovercard JS
* refactoring of PeopleController

* finished the backbone js version of hovercards
* don't try to make people_controller more restfull, out of scope
  just add a new route and use that for hovercard json
* added spec for people_controller#hovercard
* add new exception for "AccountClosed" to be able to raise from anywhere

* removed legacy code, since everything got ported to backbone
  (except the "cache" stuff, but that's not strictly necessary)

A lot of cleanup is still needed, refactoring the CSS to be consistent, removing all sorts of unused stuff etc

strip last beta leftovers and fix syntax errors, travis is kinda down, lets hope nothing breaks while I sleep

- `Rails.root` is a `Pathname`, so let's use `Rails.root.join`
- Clean up most of the remaining `File.join`s

DC DG; added LastThreeComments decorator so we don't have to load those comments when not needed (i.e. new profile pages)

and comment presenter

don't render page-viewer twice; last_post should actually get the last post posted, not the first one

phasing out app.user() for app.currentUser

fix #2627 (webfinger produces 500 error, and refactor a little to encapsulate into Webfinger object a bit more