Add header_action method for panels
Use Capybara to better test panel rendering
changed rspec syntax `stub` to `allow`
add unit test for ActiveAdmin::DSL #sidebar

ref: #3178
Merge pull request #3175 from enbaglisash/patch

changed rspec syntax `stub` to `allow`
Merge pull request #2723 from shekibobo/2552-panel-header-actions

Add header_action method for panels
oops public_send to the view context!
CSV builder: properly deal with non-strings

closes #3130; fixes a regression from #3097
fix tests after 830b0958, 3fb4c514, #3130 :frowning:
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