Setting override on per_page should not be done through additional param

[umtrey]

@bellycard/platform

Right now, we suggest adding a new line to the napa params for per_page, to set the default. We can set a default within the code block in the API action, such as params[:per_page] ||= 100. This means that the params list would be cleaner.

[shaqq]

It seems we're hardcoding the page and per_page here:

https://github.com/bellycard/napa_pagination/blob/master/lib/napa_pagination/grape_helpers.rb#L29

It'd be nice to utilize the Kaminari hooks into ActiveRecord:

https://github.com/amatsuda/kaminari#configuring-default-per_page-value-for-each-model

The dream is probably implementing Kaminari::Helpers for Napa, and most likely scrap NapaPagination in favor for those helpers.

Here are the Sinatra Helpers as an example:

https://github.com/amatsuda/kaminari/blob/master/lib/kaminari/helpers/sinatra_helpers.rb
https://github.com/amatsuda/kaminari/tree/master/lib/kaminari/helpers