remove ActiveAdmin::Config and replace it to ActiveAdmin::Resource
Merge pull request #3181 from awingla/remove_config

remove ActiveAdmin::Config and replace it to ActiveAdmin::Resource
use latest yard, stop using yard-redcarpet-ext
resync table documentation
update contributing docs
fix test failure w/ rspec 2.99.0

this is an awfully fragile test :-/
rewoard goals section in the README
fix typo in the docs
don't use RSpec 3 yet; ref #3184
style changes to data_access.rb
update status_tag example; ref #2753
`undecorate_resource` -> `undecorate`
Upgrade Capybara version and fix failing matchers
Merge pull request #3186 from petergoldstein/feature/upgrade_capybara

Upgrade Capybara version and fix failing matchers
Fix broken datepicker specs
Merge pull request #3187 from shekibobo/fix-datepicker-spec

Fix broken datepicker specs
delete outdated gems from Travis cache

If this would have prevented the errors with #3186, it’s a bug in
Bundler
Restrict to inherited_resources 1.4.x
Merge pull request #3188 from petergoldstein/bugfix/restrict_to_inherited_resources_1_4

Restrict to inherited_resources 1.4.x
Fix doc for `permitted_params`

`permitted_params` returns params that contains the resource name as its root key.

Such as:
``` ruby
  {
    'post' => {
      'title' => 'Rails is omakase.',
      'author' => 'DHH'
    }
  }
```