Add a rate_per_hour option to each_page

I was having issues even when sending only 200
requests per hour, so I've added this for
additional flexibility.

README.md

@@ -133,6 +133,7 @@ end
 - `limit`: the number of results to return per page. Defaults to 100 (the max allowed through the Giant Bomb API)
 - `offset`: defaults to 0
 - `should_rate_limit`: pass this in as true if you want to ensure that you are rate limiting your requests to under the required 200 per resource per hour (which is important if you're trying to iterate through every page of a resource)
+- `rate_per_hour`: defaults to 200 (the standard Giant Bomb hourly request limit). Override this value if you want to send more requests per hour (not recommended) or less.
 
 Example using the optional arguments:
 

giant_bomb_api.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name                      = "giant_bomb_api"
-  s.version                   = "0.5.2"
+  s.version                   = "0.5.3"
   s.default_executable        = "giantbomb"
 
   s.authors                   = ["Tim Adler"]

lib/giant_bomb_api/collection_resource.rb

@@ -12,8 +12,8 @@ def collection_resource_name(collection_resource_name = nil)
       self.instance_variable_get("@collection_resource_name") || self.resource_name.pluralize
     end
 
-    def each_page(sort: {}, limit: 100, offset: 0, should_rate_limit: false)
-      rate_limit(should_rate_limit) do
+    def each_page(sort: {}, limit: 100, offset: 0, should_rate_limit: false, rate_per_hour: 200)
+      rate_limit(should_rate_limit, rate_per_hour) do
         response = where(sort: sort, limit: limit, offset: offset, tries: 5)
         yield response
         offset += limit
@@ -51,7 +51,7 @@ def where(params = {})
 
     private
 
-    def rate_limit(should_rate_limit, &block)
+    def rate_limit(should_rate_limit, rate_per_hour, &block)
       started_at = Time.now
       num_of_requests = 0
 
@@ -69,7 +69,7 @@ def rate_limit(should_rate_limit, &block)
 
           request_time = t2 - t1
           time_to_one_hour = (started_at + 1.hour) - t2
-          remaining_requests = 200 - num_of_requests
+          remaining_requests = rate_per_hour - num_of_requests
           min_time_per_request = time_to_one_hour / remaining_requests
 
           sleep(min_time_per_request - request_time) if request_time < min_time_per_request