Add ability to inherit custom fields from RailsAdmin::Config::Fields::Association

field.properties instance variable is lost when you configure new custom field
Use AR::Base.connection instead of database_configuration
Merge pull request #1941 from marcioj/ar_adapter

Use AR::Base.connection instead of database_configuration
Prefer classes over hashy-syntax
[Minor] Fix typo: explicitely -> explicitly

In exception thrown by the paper_trail auditing adapter.
update copyright year to range
Fix rubocop offenses
Merge pull request #1946 from Fapper/patch-1

[Minor] Fix typo: explicitely -> explicitly
Merge pull request #1947 from gdi2290/patch-1

update copyright year to range
Bump version to 0.6.2
Update ra.filter-box.js

Use proper translation key
Merge pull request #1951 from gchaincl/master

Update ra.filter-box.js
Remove unused code

`@attr_accessible_role` is no longer used. This was probably missed in d521b54.
Merge pull request #1958 from deardaniel/master

Remove unused code
Fix disabling of array column type in AR adapter

Previously column types that matched `_array` were disabled as a Postgres specific workaround. ActiveRecord stopped using those column type names though.

Now a text array, for example, has column type of `text` and the `array` boolean attribute set to `true`. Instead of using the `DISABLED_COLUMN_MATCHERS`, we're now checking the `array` attribute.
Extract classes out of adapters
Hide association input for deeply nested fields

If they have inverse_of
Update Gemfile
Fix a random spec failure
Fix another random failure