Add page_access_method and per_page_access_method

[edugonch]

What does this PR do?

• Allows to user other methods name, for example, if you use kaminari and will_paginate together and you need to change the pagination method name on kaminari.

Example
/config/initializers/kaminari_config.rb

Kaminari.configure` do |config|
  # config.default_per_page = 25
  # config.max_per_page = nil
  # config.window = 4
  # config.outer_window = 0
  # config.left = 0
  # config.right = 0
  config.page_method_name = :page_kaminari
  # config.param_name = :page
  # config.params_on_first_page = false
end

/config/initializers/pager_api.rb

PagerApi.setup do |config|

  # Pagination Handler
  # User this option to meet your pagination handler, whether is :kaminari or :will_paginate
  config.pagination_handler = :kaminari

  config.page_access_method = :page_kaminari

  # Includes Pagination information on Meta
  #
  config.include_pagination_on_meta = true

  # Includes Pagination information on a Link Header
  #
  # config.include_pagination_headers = true

  # Set the Total-Count Header name
  # config.total_count_header = "X-Total-Count"
end

[kurenn]

This seems practical! Let me review it and come back to you!

[kurenn]

Maybe we can rename this to per_page to match a default value for Kaminari and WillPaginate, how does that sound?

[kurenn]

There is a meta which I think you can update to meet this two accessors, what do you think?

Also there can you provide the update for the will_paginate driver module to meet this as well?

Thanks for the collaboration!