Fix default per_page for Grape (closes #10)

Signed-off-by: David Celis <[email protected]>

Author: davidcelis

lib/grape/pagination.rb

@@ -28,7 +28,7 @@ def paginate(collection)
 
       base.class_eval do
         def self.paginate(options = {})
-          set :per_page, options[:per_page]
+          set :per_page, (options[:per_page] || 25)
           params do
             optional :page,     :type => Integer, :default => 1,
                                 :desc => 'Page of results to fetch.'