Update version of rails in the README

Not sure if it makes sense to have the currently used rails version in
the README at all, but at least it's up to date now.
Merge branch 'master' of github.com:rubycorns/RailsGirlsApp
README: Slightly copyedit
README: Missed a "GitHub"
Merge pull request #241 from mc10/patch-1

README: Slightly copyedit
Convert specs to RSpec 2.99.1 syntax with Transpec

This conversion is done by Transpec 2.3.6 with the following command:
    transpec -f

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

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

* 10 conversions
    from: be_false
      to: be_falsey

* 10 conversions
    from: be_true
      to: be_truthy

* 7 conversions
    from: it { should ... }
      to: it { is_expected.to ... }

* 5 conversions
    from: describe 'some model' { }
      to: describe 'some model', :type => :model { }

* 4 conversions
    from: describe 'some controller' { }
      to: describe 'some controller', :type => :controller { }

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

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

* 3 conversions
    from: describe 'some feature' { }
      to: describe 'some feature', :type => :feature { }

* 2 conversions
    from: describe 'some helper' { }
      to: describe 'some helper', :type => :helper { }

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

* 1 conversion
    from: it { should_not ... }
      to: it { is_expected.not_to ... }

For more details: https://github.com/yujinakayama/transpec#supported-conversions
upgrade to rspec 3!
remove depricated rspec/autorun
remove unnecessary code due to transpec
use its gem instead of super
Merge pull request #242 from rubycorns/upgrade-rspec

Upgrade rspec
add random gif panel
Merge branch 'master' into adminpanel
protect dashboard, add specs and sloths
add nested admin routes, admin_controller and specs for adminify