Add humanize_name option to CSVBuilder#column to control humanization of column name.
Add humanize_name option to CSVBuilder too and pass it to its columns.

This allows a much DRYer code if you have many column namess you don't
want to be humanized. As a bonus, any other transitive option like this
one can be added easily in the future.
Fix pagination for master
Allow for numeric status_tag tags
No defaulting class for non-String/Symbol status
Update 1-general-configuration.md

Corrected grammar. It was confusing.
Merge pull request #3238 from ushu/allow_numeric_status_tags

Allow numeric status tags
Merge pull request #3212 from fabn/pagination-fix-master

Fix pagination for master branch, refs #3211
simplify paginated_collection_spec.rb
add a test to back up #3212
Add other test for humanize_name on CSVBuilder.
Merge pull request #3145

Conflicts:
	lib/active_admin/csv_builder.rb
Add the belongs_to functionality to Page resources
Add failing test for access page's belong_to parent
Update specs for RSpec 3