Preemptive support for Ransack scopes

https://github.com/activerecord-hackery/ransack/pull/288
test agains Rails 4.0.4
Fix broken link (13-authorization-adapter.md docs)
Merge pull request #3032 from mindhalt/patch-3

Fix broken link (13-authorization-adapter.md docs)
! fix for comparison of Array with Array failed in sortable when updating existing records
use '/' as default path in case of
Update active_admin.rb

Make "cancan_adapter" get loaded even with new "cancancan" fork of cancan gem.
Merge pull request #3045 from csbrooks6/patch-1

get cancan_adapter working with "cancancan" gem, not just "cancan".
Convert specs to RSpec 2.14.8 syntax with Transpec

This conversion is done by Transpec 1.10.4 with the following command:
    transpec -f

* 71 conversions
    from: its(:attr) { }
      to: describe '#attr' do subject { super().attr }; it { } end

* 64 conversions
    from: obj.should
      to: expect(obj).to

* 25 conversions
    from: obj.stub(:message)
      to: allow(obj).to receive(:message)

* 23 conversions
    from: == expected
      to: eq(expected)

* 6 conversions
    from: obj.should_not
      to: expect(obj).not_to

* 2 conversions
    from: obj.stub(:message).and_return { value }
      to: obj.stub(:message) { value }

* 1 conversion
    from: Klass.any_instance.should_receive(:message)
      to: expect_any_instance_of(Klass).to receive(:message)
Merge pull request #3047 from petergoldstein/feature/run_transpec

Convert specs to RSpec 2.14.8 syntax with Transpec
Merge pull request #3043 from timoschilling/default_namespace_path

default namespace devise problem
Merge pull request #3042 from beatrichartz/master

! fix for comparison of Array with Array failed in sortable when updating existing records
reduce double code in FormBuilder#has_many
Merge pull request #3051 from timoschilling/form_builder_codereduce

reduce double code in FormBuilder#has_many
Update dependencies so we can bundle with Rails 4.1
Merge pull request #3057 from romansklenar/rails-dependencies

Update dependencies so we can bundle with Rails 4.1
test Rails 4.1.0 on Travis

closes #2759
remove trailing whitespaces
Merge pull request #3058 from timoschilling/remove_trailing_whitespaces

remove trailing whitespaces