#2039 Accept block for download_links
#2039 Ensure that download_links supports stabby proc syntax `-> {}` by using `instance_exec`
Separate Kaminari theme

Prevents ActiveAdmin's pagination from being overriden by any
customizations made to the Kaminari views in a Rails app that uses
ActiveAdmin. Fixes gregbell/active_admin#1126.
Removed body.active_admin encapsulation for global-reset.
Removed body.active_admin encapsulation for other active admin styles..
Remove deprecated dashboard logic
remove deprecated CSV, sort_order, & namespace settings
router refactor :heart:

Same behaviour, save that all actions now support multiple HTTP verbs.

Removes outdated test from #780
Merge pull request #2165 from Daxter/cleanup/remove_custom_dashboard_logic

Remove deprecated settings and code
Fixed a TODO in resource_spec by wrapping filter addition specs inside a context
Bumped up version of better_errors gem in Gemfile to improve code climate
add Coveralls to track test coverage
add coverage badge to README
added missing and fixed wrong german locales for comments
bugfix: apps no longer use the same namespace hash

This was a big issue when running tests, since this:
```ruby
app = ActiveAdmin::Application.new
app.namespace(:brand_new_ns)
```
Would end up creating `:brand_new_ns` in the main app, since our
settings module (which doesn't dup objects) was being used to create
the `namespaces` API.
cleanup
move setting inheritance into its own module

Also added missing tests for `ActiveAdmin::Settings`
Merge pull request #2313 from Daxter/bugfix/namespace-pollution

Bugfix: apps no longer use the same namespace hash
update README's Code Climate badge to show our grade
Mexican spanish messages added.

Created `es_MX.yml` file.