some styling for input[type=button] as for input[type=submit]
some styling for button as for input[type=submit]
use type_for_attribute when available
column_for_attribute is deprecated in rails 4.2
Replaced map.flatten with flat_map
Merge pull request #3501 from strivedi183/minor_refactor

Replaced map.flatten with flat_map
Merge pull request #3487 from timoschilling/rails_4_2_deprecation

remove rails 4.2 deprecated method column_for_attribute
raise strong params exceptions in test env
Permit certain request parameters by default
get the existing tests passing
Replace gsub with tr where possible
Merge pull request #3505 from vladimir-tikhonov/replace-gsub-with-tr

Replace gsub with tr
Merge pull request #3422 from timoschilling/button_style

button styling
Merge pull request #3504 from activeadmin/2595-permit-default-params

2595 permit default params
list all maintainers in the readme
Updated to fixed inherited resources