base support for custom ransackers
use ransackers as default filters
remove dashbord view

I think @seanlinsley forgot him in 86851c603c9627c54ef73f27cbef2e2ef18a30b5
fix f.inputs with class
change PunditAdapter to work with method_missing
refactor DownloadFormatLinksHelper
remove js window.AA
simplify AA::Devise.config

Devise has `sign_out_via` since v1.2.0 (ab7f3bc1757104c053d3e3c9bf6db2de03dee830), and we have a min (soft) dependency to v3.2.x https://github.com/activeadmin/activeadmin/blob/master/lib/active_admin/dependency.rb#L3
Merge pull request #3562 from activeadmin/remove_dashboard_view

remove dashbord view
Merge pull request #3516 from activeadmin/base_filter_support_for_custom_ransackers

base support for custom ransackers
log formtastic to `3.0.x`

Formtastic produces dozens deprecation warnings. We look them to `3.0.x` until #3544 is implemented. This closes #3624.
use formtastic 3.1 with custom namespaces
Merge pull request #3633 from mikz/formtastic-custom-namespaces

Use formtastic 3.1 with custom namespaces
add Page#namespace_name

Page#namespace_name returns the name of the page namespace. This is usefull for cancan abilities for namespaced pages.
```
ActiveAdmin.register_page "Dashboard", namespace: "foo"

class Ability
  include CanCan::Ability

  def initialize(user)
    can :read, ActiveAdmin::Page, :name => "Dashboard", namespace_name: "foo"
  end
end
```

This closes #2854
change authorization docu for namespaced pages
change docs hash style to 1.9 syntax
Merge pull request #3568 from activeadmin/3560_fix_inputs_with_class

fix f.inputs with class
don't use have_selector in form builder spec
fix gitignore for localeapp
simplify gemspec