Pagination improvements (#1445)

* Replace will_paginate with kaminari

* Use #page instead of #paginate in controllers

* Replace will_paginate.page_gap with pagination.truncate in i18n

* Customize kaminari views to match prior styles

* Set kaminari options to match prior behavior

* Replace will_paginate with paginate in views

app/views/accounts/followers.html.haml

@@ -9,4 +9,4 @@
   - else
     = render partial: 'grid_card', collection: @followers, as: :account, cached: true
 
-= will_paginate @followers, pagination_options
+= paginate @followers

app/views/accounts/following.html.haml

@@ -9,4 +9,4 @@
   - else
     = render partial: 'grid_card', collection: @following, as: :account, cached: true
 
-= will_paginate @following, pagination_options
+= paginate @following

app/views/accounts/show.html.haml

@@ -31,4 +31,4 @@
 
   .pagination
     - if @statuses.size == 20
-      = link_to safe_join([t('pagination.next'), fa_icon('chevron-right')], ' '), short_account_url(@account, max_id: @statuses.last.id), class: 'next_page', rel: 'next'
+      = link_to safe_join([t('pagination.next'), fa_icon('chevron-right')], ' '), short_account_url(@account, max_id: @statuses.last.id), class: 'next', rel: 'next'